- Creator's Pet: Writers love using him, fans hate seeing him. If they wanted to see Superman with mental problems, they would've just gone to Superdickery.
- The Good News: He's finally dead! The Bad News: despite being utterly useless for most of his comics existence and a FaceHeel Turn that also revealed he was an Eldritch Abomination and saw him try to destroy the world, his send-off issue was nothing but the entire cast of Marvelverse heroes waxing poetic about how wonderful he was and how he'd made their lives better in flashback retcons. The hamfisted attempt at Alas, Poor Scrappy was not well-received.
- Rogue had sex with him first, despite the fact that was established in the pages of Xtreme X-Men that Rogue lost her virginity to Gambit when the two lost their powers.
- Ben Grimm told how Sentry stopped him from killing the Wrecker, because Heroes don't kill, no matter which crimes the villain committed. Hum, hello? Just after awakening in New Avengers, Sentry carried Carnage into space and ripped him. Of course Carnage recovered, but Sentry clearly intended to kill him, despite Carnage not being a serious threat for someone as powerful as Sentry. Spider-Man always overcame any temptation to kill Carnage, even if he's one of his most fearful nemesis.
- He's better at everything than everyone else, better at molecular manipulation than Molecule Man, for instance (it is debatable as to whether this was the Sentry or the Void, an issue even further complicated by the fact that no one really knows what the hell either of them are). All this may come with the territory, given that he's heavily implied to be Death and all that...
- He's a perfect example of an interesting character/idea turned into a walking plot device.
- This was dialled down somewhat following his return in Uncanny Avengers, when he returned without the Void, and with a new and entertaining form of insanity/nature as a Humanoid Abomination as one of the Horsemen of Death, then in Doctor Strange, which was followed by a surprisingly well-received miniseries that resulted in him merging 'Robert Reynolds', 'the Sentry', and 'the Void' into a new cheerful, somewhat psychotic Well-Intentioned Extremist persona that identifies itself as the true Sentry.
- Moral Event Horizon: Joining freakin' Norman Osborn in the first place, later killing Ares.
- Never Live It Down: He threw one bad guy into the sun. But that doesn't stop fans (and even some characters) from sarcastically suggesting it as a solution for every fight. He even lampshades this himself when Ms. Marvel asks him not to throw a villain into the sun (because they're actually a transformed Tony Stark):"I don't throw everything into the sun."
- Nightmare Fuel:
- Some of the things The Void gets up to can be cringe-inducing, but its unbelievably violent murder of Ares really, really takes the cake.
- The fact that The Void is ultimately so horrifying that the Sentry actually asks for a Mercy Kill.
- His reappearance in the Apocalypse Twins arc of Uncanny Avengers as the Twins' Horseman of Death, which has a notorious scene in which he tears his own head apart and reduces it to a disembodied brain with mad, staring eyes◊.
- Rescued from the Scrappy Heap: His reappearance in the Apocalypse Twins arc of Uncanny Avengers as the Twins' Horseman of Death was well-received on the grounds that a) it made him look pretty cool, b) the Void was nowhere to be seen, having supposedly got bored with the constant resurrection-destruction he underwent in the sun, c) his insanity was now less 'destroy all the things!' more 'I am the heir to Apocalypse and I will protect Earth' and it stayed intact at the end of the arc.
- The Age of the Sentry miniseries won a number of people over, mostly because it decided to drop any pretense of him being a dark deconstruction, in favor of just writing him as an Affectionate Parody Sue of the Silver Age Superman existing in the 60s Marvel universe. As it turned out, this had the side effect of making him actually heroic, likeable, and charming, and won over Superman fans who appreciated the homage. Even the Character Shilling worked, because it both was clearly a joke (one issue features every hero in the universe showing up to his birthday party) and somehow made more sense (since this Sentry was actually the sort of person who'd warrant such friendships). Sadly for the character, Age of the Sentry isn't canon to the main Marvel universe, so this didn't help the character much (though the good Sentry eventually came back in Contest of Champions).
- His appearance in Doctor Strange depicts him as the Only Sane Man between Loki and Strange. It's a far better characterization than the generic insane guy with superpowers according to the fans.
- Furthermore his miniseries by Jeff Lemire, which follows on from Doctor Strange, portrays Bob as struggling with Sentry in the same way normal people struggle with mental illnesses like schizophrenia. It's a rather good use of the character. Tellingly, Sentry himself doesn't actually appear (in the real world at least) until Issue #3. And when he finally does appear, it leads up to a finale with Bob merges himself, the Sentry, and the Void into a new gestalt Sentry, who ends up sharing the previous Sentry's focus on protecting humanity from the rest of the universe.
- The Scrappy: He is one of Marvel comics' most hated characters, partly because he is so overpowered.
- The fact we are told he is more noble, has more willpower and courage than anyone alive, then accepts being basically a foot soldier for Norman Osborn because he happens to be in charge, didn't help any...
- He was actually well-received initially due to his interesting origins and that he had a cool fight with the Green Scar in World War Hulk, but when different writers got a hold of him, they started going crazy with his powers, skyrocketing them (take note that he couldn't beat the Green Scar), and making him immortal unless he wants to die, and despite the above, a massive amount of Character Shilling.
- His origin itself was a pretty bare bones. He broke into a lab and stone a random vial, which upon drinking gain the power to shatter the axe of Terrax. Terrax, who was created from the alien science of Galactus, whose technology was advanced enough to survive the end of the prior universe before the restart of the next big bang, after which he "incubated" for eons in an "egg" after discovering and learning to manipulate "the power cosmic" and create things like an axe that could carry heralds across space to search out planets for him to eat. A random vial from a civilization still dependent on fossil fuels. At least Hulk had the 'gamma ray bursts are the strongest explosions so Hulk is strongest one there is' mantra.
- Take That, Scrappy!: His appearance in The Incredible Hercules, in which Hercules happily exploits the fact that Sentry doesn't have any real fighting skills.
YMMV / The Sentry