These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Broken Base: It's debated when the series truly began it's epic fall from grace which came to an end in the wake of the disastrous RIDE and franchise killing SHRED.
Some fans point to as early as Tony Hawk Pro Skater 4 beginning the downward trend in quality, citing it's Obvious Beta status and it being an inferior follow up to the much loved third entry.
Whilst more might look at the two THUG games as heralding the end while others see them as being flawed but ultimately enjoyable.
And finally depending on who you ask THAW was a step in the right direction after the THUG games, the last 'classic' Tony Hawk game or an ill omen of what was to come.
A few even point to 3 as the start of the series' downfall, saying that the introduction of the Revert made the game way too easy (nevermind that its use is entirely optional).
Crowning Music of Awesome: One of the consistent high points of the series is its mix of licensed music, which offers a little bit of something for fans of many music genres (hard rock, heavy metal, rap, etc.), though mostly punk rock/hardcore, and from Underground on, emo as well.
Dork Age: Some believe it got swept up into one with the release of RIDE, but it can be argued that the gears were already turning as far back as Underground 2 (or even before that, following the release of THPS4).
Depression? Here's a quarter. Tell someone who cares.
Ear Worm: "Superman" by Goldfinger, from the original. Made the cut for THPS HD due to its infamy.
Few can forget the intro to "96 Quite Bitter Beings" by CKY from THPS 3.
In the Nintendo 64 games, the songs chosen at random would loop as long as you made your run in any level. So many of the songs from said games could count for N64 players (e.g. "Jerry Was a Race Car Driver" or "Police Truck" in the first game)
Even Better Sequel: The first THPS received good reviews upon release. THPS2 is considered one of the best games of all time, and it received tens from several reviewers. And then there's THPS3, the first sixth-gen entry in the series, which also got top scores for said sixth-gen versions. Tony Hawk's Underground 2 is considered to be the best game in the series by many, although older fans complained that the game's mechanics and speed made it too easy.
"Funny Aneurysm" Moment: In the New Orleans level of THUG2, you can trigger an event that causes the whole area to look much more dilapidated, with all the people turned into walking corpses. The game was released less than a year before Hurricane Katrina hit.
THPS2 and THPS3 would add up the total amount of degrees you spin in a combo and multiply your entire combo's score as if it was one air. For example, if you do a combo with five grinds and five 180 degree spins, you get credit for five 900 grinds.
In THUG, certain hidden double-tap grinds like darkslides reset your balance to the center. In certain levels, like Moscow, you can keep grinding circles around the level forever.
Also in THUG, walking. If your balance was weakening or you feared that you were going to bail at a fall, you can simply get off your board to avoid a bail. No matter how high the skater is or where the skater stands, his or her legs will be perfectly fine.
Grinds in Sk8Land don't cause the balance meter to appear until about half a second into the grind, so if you jump again within half a second, you cannot bail the grind. If your combo consists only of grinds and wallplants, you can combo forever.
Manuals in THAW, literally letting you get your multiplier into the 50's, by randomly mashing a couple of the buttons. Gets worse when your manual skill gets high, because it becomes STUPIDLY easy to balance.
Les Yay: In THUG, if you select a girl character the dialog in story mode doesn't change. This leads to some interesting dialog involving your love of Russian women and a woman who wants to "show you a few tricks".
Nintendo Hard: Some of the games have some rather insane challenges even for players who can rack up million point scores easily, especially Pro Skater 4's Pro Challenges and Project 8's Sick rankings on missions.
Japan was denied several games in the series, including 4 and Underground 2.
Only the US and Canada got Tony Hawks 2x and Tony Hawk's American Wasteland: Collectors Edition, which both had exclusive levels. UK fans in particular were very annoyed about this.
The Scrappy: Eric Sparrow. Your former friend turned rival from Tony Hawk Underground. Long after he's proven himself an untrustworthy jerkass the game has your character continue to trust him when any reasonable person would have told him to go to hell ages ago. Worse still it gets to the point where he's actively trying to destroy your life and none of your other teammates notice or care.
A lot of critics and fans find the combo system to be insane. The first game rewarded you well for making one move in the air. When the later editions came, making 50-trick combos was practically a breeze, even required, and one mistake would discredit the entire combo.
The board peripheral for Ride, full stop. It's so imprecise, you'd wonder what kind of mechanics were they thinking of when they made it.
Sequelitis: It's debated by fans where and why exactly public perception of the series started to go downhill (pardon the pun). General consensus is that the decline started somewhere between Underground and American Wasteland, and hit a low with Tony Hawk: RIDE, which has been derided for being overly expensive and gimmicky (since the player is forced to use a skateboard peripheral to control the action - and a faulty one at that, as mentioned above).
Take That, Scrappy!: Seemingly aware of how much the player would loathe Eric Sparrow, THUG delivers an alternate ending when you've beaten the game a second time. Instead of accepting Eric's challenge to win back the skating footage he stole the Player Charactersimply takes the tape off him andslams an elbow into his smug face. All in one beautiful motion of the arm. In THUG 2 he basically becomes the Butt Monkey for the team and even after trying to cheat you out of your place eventually gets caught out and booted off the tour. And you'll love every second of his torment.
Win Back the Crowd: Seems to be the objective with Tony Hawk's Pro Skater HD: an HD-ification of select levels from the first two Tony Hawk games, reimagined in a brand new engine, with the old-school gameplay (for one, no walking).