Being immortal. I wouldn’t want it for the same reason it’s a drawback for me. I can’t wrap my head around anything never ever ending.
Having a sticky situation power like Spider-man had in his first movie. I know Spider-man is in Marvel, but that still count, right?
Anybody interested in examining the logical consequences of super-powers should read Prof. James Kakalios’s book “The Physics of Superheroes”. He tackles very important questions, like “If Electro runs, does he become Magneto? And vice versa?”
Check out Man of Steel Woman of Kleenex by Larry Niven. It covers the downside of super-reproduction.
It twists my head if I even attempt to consider it. Even space being infinite & expanding is too much for me to deal with.
Flash being too “fast”
Hawkgirl said it in Justice League, Wally being the “fastest man alive,” “might explain why you can’t get a date”