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.
YMMV: Red Hulk
Arc Fatigue: The mystery of who Red Hulk was dragged on for roughly two years; by the point the arc was finished, nobody really cared.
Creator's Pet: The Red Hulk under Jeph Loeb. Shortly after being introduced he beat odin-forced Thor with his own hammer, punched out the Watcher, killed the Grandmaster (who is immortal), casually killed off the whole Defenders (including the Silver Surfer!) and much more. Luckily, he got depowered when Parker took over, and every hero that has been beaten by him before returned to return the favor in some very satisfying ways.
My Real Daddy: Jeff Parker, the writer on the red Hulk's solo title, has done an amazing job of rebuilding and redeeming the character.
Villain Sue: Red Hulk initially goes around beating up people regardless of whether this makes any sense at all - the part where he picks up Thor's hammer (which can't be picked up by anybody less pure of heart than Thor or Captain America [granted, Thor was holding it at the time as well]) and beat the God of Thunder up with it. Then there's that great image of him riding the Silver Surfer's board after absorbing his Power Cosmic while wielding Terrax's halberd (which once provided the image for the Villain Sue page). He even kills somebody who is explicitly immortal. Granted, Red Hulk wasn't the first to do some of the things he's criticized for. (Baron Zemo even once killed said immortal, for example, who simply came back later. And the issue of Thor's hammer can be spotty.) However, such actions tend not to be glossed over when others do them, so it's not like Red Hulk is going to get a pass.
Take That, Villain Sue!: Once he makes a Heel-Face Turn, Thor and Galactus decide to have their way with him in retaliation. The moment where Red Hulk wields Mjolnir is handwaved in that he picked it up in space where there is no gravity and turns out he can't lift it on the surfaces of planets.