Hmm. Gonna have to ignore the rules a little bit. None of the powers I really want are clearly defined in function.
1. Total control over my body chemistry, down to the molecular level. Like, I don't age if I don't want to. If I get shot, I can shut down bleeding and repair the wound really fast. I can stop cancer before it starts, kill off any diseases I catch by willing it so. And it needs to be instinctual healing to a large degree, in case my brain ever gets damaged, so it can self-repair.
2. The power to manipulate time, and my perception of time. Just having total power over time is no fun; it's pretty much "god mode". I just want to be able to, say, do some matrix-style bullet dodging, or slow time/speed up my perception if I'm attacked, so it's like I have superhuman reflexes. Or if I need to think about something for a while, but time is short, then I can just have like an instantaneous internal monologue that is subjectively (for me) hours long. Or if I'm trapped in a blocked-in cave for two months, I can go into stasis and experience no subjective time.
3. Magic. Like D&D-style, "cast magic missile", cliche magic stuff, and I want to be really, really powerful. Because I want to actually cast magic missile at something. Or a fireball. I want to call down a rain of hellfire as my eyes get all glowy and I cackle maniacally, and a chorus chants unintelligible but ominous-sounding things in Latin.
To put this in video-game parlance, there would be like a ten-minute, unskippable end-game cutscene before the heroes can fight me. And everyone would complain that the game was too hard because the last boss fight is unwinnable.
Yeah, I'm gunning for "supervillain" with this. Raising armies of the undead, leveling cities, casting continents into the sea and raising new lands at my whim. Perverting the laws of nature to create magically mutated abominations. Summoning demons. Evil stuff like that. I might even go into politics. Or not... don't know if I'm that evil.