Jerkass Has a Point: Belkar has sometimes a better idea of what's going on than his goody-two-shoes companions.
Even Hinjo, a paladin, has to admit it once, about why his uncle would refuse resurrection.
Belkar's insistence that Vampire!Durkon be killed at the first calm moment was probably the best course of action all things considered.
Jock Dad, Nerd Son: Inverted with Roy Greenhilt and his father, Eugene. Roy chose a career as a fighter class as opposed to a wizard like his father, which are seen as a jock and nerd class respectively at least in universe. Played straight with Eugene and his father, Horace, who had inspired Roy's career path. Interestingly, Roy was apparently a nerd compared to other fighters.
Roy: Well I hate to break it to you dad, but this isn't the end of the line. More like half-time. Eugene: What? How can you halve time itself? Roy: *Sigh* I should have known a sports metaphor would be wasted on you.
Just Between You and Me: Redcloak to Tsukiko. In a minor subversion, he says it before he springs his trap. And in a further subversion, he actually does make sure she never reveals it to anyone. Ironically, this is immediately after she attempts to pull the same trope on him.
Tsukiko is eaten by her own wights, at Redcloak's command. He wanted to make a point about how the undead aren't allies, they're tools. Finally he orders them to eat each other, and the last one to destroy itself in the fireplace.
Tarquin, always preocuppied with the story and his impact in it and on his son Elan, is left in the middle of the desert with no sense of closure, after Elan tells him he isn't the real villain of the story.
Just Hit Him: The raging Thog's main tactic in his gladiatoral fight with Roy. Sure, being thrown into walls is damaging, but it also gives Roy enough breathing time to put together a strategy, and even puts him in the perfect position to enable it when Thog throws him into the spectator rows.
Katanas Are Just Better: Azure City is the Stick-verse's Wutai, so katanas are favored by many of the soldiers and members of the Sapphire Guard. Belkar and Nale have both averted this trope, fighting with katanas they stole from Azurites, but switching to their preferred weapons at the first opportunity.
Hobgoblin: (kills the guard Nale just disarmed) Hey thanks! I guess I'm lucky you really needed a katana! Nale: I prefer longswords, actually. (kills the hobgoblin and takes his sword)
Invoked posthumously in regard to Crystal. Elan says he's not mad at Haley for it, as long as she's sure Crystal was "really, REALLY bad." Haley responds that she once saw Crystal headbutt an elderly gnome woman into a coma, which makes Elan feel better about it.
Discussed in "Executive Order". After Tarquin has committed some of his worse on-screen actions so far, he says he has one last one to do before letting Elan leave:
Elan: What, do you have a bunny you need to punch in front of me or something? Tarquin: No, I'm talking about your dismal combat performance back at the pyramid. (to Kilkil) Though make note of the bunny thing for next time, that's good stuff.
V's murder of Kubota certainly showed just how much more of an Anti-Hero the elf had become, but if there was any antagonist that deserved to be unceremoniously disintegrated and scattered to the winds, it was this one.
Similarly, Haley's murder of Crystal is commonly seen as this, though a few still found it a bit unsettling. At least until you buy the fourth book, then read the scenes where Crystal tries to kill Haley several times while they're retrieving Roy's body.
Also Miko pursuing Belkar, especially if you consider what Belkar's conduct looks like from inside the comic's world.
When Belkar kills the Chimera at the very beginning.
Trigak: You may have won this round, Order of the Stick, but we swear our revenge on you! When you least expect—! GAK! GAK! GAK!
Xykon does this to a group of mercenary ogres who are complaining about not being paid very early in the comic's run, (and then he zombifies their corpses so he can still get some use out of them), perhaps giving the first hint that he's not a harmlesscliché storm of a villain, despite appearances.
This is also how Roy Greenhilt dies, mid-pondering in freefall.
Miko was given a very final-looking death scene, and the only person who seemed interested in her corpse (to make an intelligent undead, not resurrect her) passed up on the chance because it was an incomplete body (also, Word of the Giant is that she's staying dead).
Therkla was betrayed by her boss/father-figure and Elan won't be her boyfriend so she has no reason to be revived.
The following people are staying dead because their bodies were destroyed or rendered inaccessible, and resurrection requires a body:
Kubota's body was disintegrated by Vaarsuvius, and the ashes were then spread to the winds.
Thanh's body was buried under a mountain after being slain by Redcloak's Osmium Elemental.
After Redcloak seized control over her wights, Tsukiko was level-drained to death and then they ate her body. Then that wight was eaten by a second wight, who was eaten by a third who was eaten by a fourth who committed suicide with fire.
Yukyuk's corpse was destroyed during the explosion of the Draketooth Clan's pyramid.
Malack was burned to ashes by the sun after his Protection From Daylight spell was dispelled.
Nale was disintegrated after being stabbed in the heart, with his ashes being blown away by the wind.
Roy has to bound and gag Durkon in the Wooden Forest so that he'd stop freaking out about trees and risk alerting the bandits.
Durkon: (gagged) Mmph mrph mmmph mmf mrf mrrrph mrph! Roy: I'm going to choose to attribute that comment to stress and not hold it against you in the future.
The team also keeps Belkar tied up and gagged after Nale used a Charm Person on him... and a few hours afterward in the morning, even though the spell had already worn off, since the halfling is better company like this.
Parodied: Therkla gets to be the valedictorian of her ninja class by killing the original.
Also how Redcloak became supreme leader of the hobgoblins, by killing the one he assumes is their leader. The real leader wisely keeps his mouth shut and lets Red take over.
When Belkar, Haley, and Celia disguise themselves as some corpses and a necromancer to get past two hobgoblins, one of the hobgoblins doubts Belkar actually is a corpse, so Belkar stabs him to death. The other gets the message and lets them pass, then says "Thanks for the promotion" as they leave.
Knows A Guy Who Knows A Guy: Belkar suggests selling some captured enemies into slavery, adding that he "know[s] a guy who knows a guy" to contact for this. Much later, we meet the guy in question, Buggy Lou. His best supplier on the Northern Continent was pals with Belkar.
A Lady on Each Arm: In On the Origins of PCs, a newly-jailbroken Belkar is just musing that life couldn't get any better when happens upon a sign saying, "WHORES: 2-for-1 Sale!" The next panel is the three of them walking off like this.
Also, Nale got the convoluted planning ideas and general "smarts" from their mother. He also inherited Tarquin's major flaw: An all encompassing belief that the world revolves around him, and a tendency to let his obsessions overrule his better judgement.
Ian seems to believe family members have everything in common, and refuses to admit that the son of Tarquin could be not as evil as his father.
The memory charm around the Oracle that makes you forget everything about your visit except your questions and their answers as soon as you leave.
The same thing is going for the afterlife. Roy can remember the time spent on the clouds with his father and the scrying they've done, but past the big gate his memories are fuzzy, though he remembers some bits.
Elan: Nale! There's nowhere to go. Surrender! Nale: Surrender? Never, you moronic little twit. I'd rather die than— (bridge crumbles underneath his feet, leaving him dangling by one hand) Nale: Help me, brother! Elan: Karma-riffic!
Redcloak's right eye, reflecting his late brother, who had lost his left eye. You can tell that he's actually screaming at the irony, as opposed to the pain from the stabbing of his eye.
Vaarsuvius was already feeling guilty about using fiend-granted powers to wipe out every creature related to a black dragon, but even so the elf probably wasn't expecting it to bite them in the ass like in "All in the Family".
Laughably Evil: Many villains (and one protagonist); Burlew is very good at writing characters who are both likeable (funny, awesome, etc.) and yet definitely villainous and unsympathetic. Examples include:
Xykon. All over the place.
Belkar. And he knows it.
Belkar: I'm comedy gold! I'm the only funny thing left in this damn comic strip!
Paladins are noted to have this reputation, but actually rarely show it... with one unfortunate exception. In general, Lawful Stupid, Stupid Good, Chaotic Stupid and Stupid Evil are all demonstrated by one character or another at different times. (Miko Miyazaki arguably demonstrates all four, sometimes all in the same comic.)
Roy: You're not Good, at least not any definition of Good that I would want to follow. You follow the letter of the alignment description while ignoring its intent. Sure, you fight Evil, but when was the last time you showed a "concern for the dignity of sentient beings"? You're just a mean, socially inept bully who hides behind a badge and her holier-than-thou morality as excuses to treat other people like crap.
Left-Justified Fantasy Map: A map of Azure City and its surroundings appears in the back of War and XPs with a sea along the left edge. However, the western continent should appear on the other side of the sea.
Xykon: So, let me get this straight. Your father spent his entire life looking for me over a largely inconsequential killing? (Magic Missile.) Roy: Yes! You killed his master, and he swore an oath to destroy you! Xykon: And he was too much of a loser to get the job done before croaking, so now you, Loser Jr., have taken up the task?
V and Blackwing, after V's question is answered via Answer Cut.
Vaarsuvius: A planet? Within the planet? Blackwing: That's pretty much what I said, yeah.
Lethal Joke Item: The bag of tricks, which summons random animals. Roy eventually finds creative uses for it, like making distracting kitties. It also has a compact rhino on it, but it kinda backfired.
During Azure City's New Year, Belkar gets drunk and kisses Vaarsuvius full on the lips. Afterwards, Belkar forgets it entirely and Vaarsuvius insists that, if the one witness to the kiss (Durkon) ever has to discuss it again, it will be referred to it as "the Event". And they never talk about it again.
While being interviewed for the Lawful Good afterlife, Roy Greenhilt stops the bureaucratic deva interviewing him before she can mention the Gender Bender incident within earshot of his father, who is standing not ten feet away.
The Order itself, as revealed in On the Origin of PCs.
Also, Redcloak and his brother Right-Eye, as revealed in Start of Darkness.
Literal Genie: Subverted. Roy, wary of this happening, words his question to the Oracle in such a way that it works against him. His concern made sense, as this trope was played straight the first time he visited the Oracle (offscreen):
Sabine: It's hard, but sometimes, I need to make a sacrifice in order to maintain our love. Roy: Like dressing up for him? Sabine: No, I meant a literal sacrifice. I have a desecrated altar waiting for your corpse in the next room.
Look Behind You: In "Good to the Last Drip", Vaarsuvius is so busy attempting to Disintegrate Qarr that only the small imp notices an ancient black dragon with a personal vendetta approaching from behind.
Loophole Abuse: Redcloak orders the Silicon Elemental he summons to "kill [the Order]. Starting with the human with the greatsword [Roy]." Haley manages to make it change targets by taking Roy's sword.
Lotus-Eater Machine: In "Victory Comes from Within", Belkar is killed, Vaarsuvius returns from their disappearance, and Roy manages to use a new trick to disable and kill Xykon. But then it's revealed that this is all taking place in one of Girard's illusion traps. The illusion proceeds to give the Order a happy ending, with Durkon returning alive, the Order dumping Xykon's phylactery into a volcano, Elan making up with his family, the liberation of Azure City, a grand tomb made in honor of Belkar and Scruffy, the Order enacting justice on Bozzok, Vaarsuvius and Durkon working together to repair the destroyed Gates, et cetera on to infinity. The strip after that reveals that fighters have become more popular than wizards, as per Roy's dream. And that Tarquin has even decided to remarry Elan and Nale's mother, with Malack officiating and everyone in attendance. The Order successfully disbelieves the illusion when it does too good a job of giving the Order what they want, and Elan realizes that many of his dreams are too silly or unrealistic to ever be realized.
Luckily My Powers Will Protect Me: In Start of Darkness, the rematch between Lirian and just-turned-lich Xykon is basically Lirian using all the wrong spells and abilities so Xykon can explain why none of them work anymore. Admittedly, it isn't out of character for Xykon to taunt his opponent by pointing out why his opponent can't beat him, even if that essentially means giving tips on how he or she could.
Luke Nounverber: The Greenhilt family doesn't count since it's actually named from the ancestral sword, but we have plenty others: Haley & Ian Starshine; Belkar Bitterleaf; Durkon Thundershield; Hilgya Firehelm; Leeky Windstaff; Girard Draketooth; Fyron Pucebuckle; Miron Shewdanker; Hieronymus Grubwiggler; Reegon Mithrilspear; Hiran Sinkeye; Clang Killitchy; Deergar Bluehawk; Firuk Blackore; Darren Leafsword; Laurin Shattersmith...