Honestly? Even if I had superpowers, I wouldn’t become a superhero, so I probably wouldn’t choose something like superstrength. Instead, I’d pick practical things useful in everyday life while not being too obvious to others.
Time control would be my main and most important one. Not the ability to see every possibility or anything like that, that would be tiring. Instead, simply the ability to start/stop/slow down/speed up/rewind/fast foward time. Three minutes to complete an assignment? I can finish it in zero! Boring lecture you need to attend? Speed it up! etc etc. Basically means I can procrastinate all day until right before due dates too, which is a nice bonus.
My second pick would be complete control over my own mind. This can extend to “unlocking the full brain” (using 100% of my brain instead of 5% or whatever like we actually do), having perfect self control (I can break free of addictions whenever I want, stop procrastinating whenever I want etc) or just focusing my thoughts almost entirely on something.
My final pick would be perfect health (to an extent). I wouldn’t go for immortality simply because living until the end of the universe would be pretty depressing. Especially the “watch every friend and family member you have die” part. Instead, perfect health. I don’t catch colds, I don’t get cancer, I don’t get sick. I basically can’t die except of old age.
Basically, I’d just maximise my productivity and time I have left lol.