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.
Dork Age: Her second series, The Sensational She-Hulk, languished in a Dork Age before and after John Byrne's two runs on the title.
Foe Yay: Titania is obsessed with defeating She-Hulk. Her husband left her because she was too focused on beating Jen, and she didn't even notice. A Watcher has commented on it. Doc Samson even suggests that her fixation on She-Hulk might be sexual (though this was more to distract her during a fight rather than a serious diagnosis). Even Jen has called her out on it, asking why Titania cares so much.
Harsher in Hindsight: In She-Hulk Volume #2 Issue #4 of Dan Slott's run, Jennifer declares Bruce Banner has never killed anyone during his Hulk rampages, because if he had he would have committed suicide to keep it from ever happening again. Seven years later in The Avengers film Bruce claims that he can't kill himself, even if he tries.
In Ultimate Marvel, readers are dealt a Shocking Swerve when that universe's version of Shulkie turns out to be Betsy Ross, rather than Jennifer Walters. Then, in mainstream continuity, we get the The Reveal for Red Shulkie's identity. Guess who again?
When Spider-Man sues Jonah Jameson for defamation he claims Jonah hates him because he's black. Eventually one version of Spidey (though not Peter Parker) would be a black kid under the mask.
Squick: In the alternate universe "Old Man Logan," a trio of redneck Hulks rule over the West Coast. The implication? Bruce raped Jennifer and had children with her (his first cousin) because she was the only one who could "handle" having sex with The Hulk.