Just wanted to get a discussion going.
Just to start us off, I'll talk about mine. Mine vary.
My protagonist, who is a goddess, is capable of lifting 100 tons and has access to powerful magical attacks.
Another was able to defeat 1,000 swordsmen in a bloodlusted state. Think on a Naruto level of power, if you're familiar with manga.
Another is able to destroy a solar system with his weakest PSI attack.
And so forth. I'm curious to see what you guys have created.
Interesting powers...
As noted already, having incredible powers can lead to continuity issues.
With your last guy, the one who can destroy whole solar systems just by thinking about it, I take it that he can travel instantaneously throughout the Universe. The power is of pretty limited use if you are restricted to travelling at the speed of light. [Ha - I will destroy this Solar System - Hum, just wait a year or so while I travel to the next one - now, where was I.] If he can travel anywhere, all at once, and assuming the Universe is infinite, what stops him destroying a solar system then travelling to one that is almost the same but has nicer cup cakes. What stops him being Evil?
I always had trouble with Superman. Why isn't he evil? If I was him, I'd first make sure all the Kryptonite was unobtainable then set myself up as God. People will do whatever I want. Doesn't that mean automatic goodness for everyone (in an Evil, twisted sort of way)?
And why masquarade as Clark Kent. Loise, here I am, your God. Worship me or I'll burn you with my laser vision. Don't try and run away. I can fly. And, hey, as if I really care if I kill you. You'll get old and wrinkled anyway. I live forever. I can always enslave your great grand daughter whose prettier than you. You never liked me as Clark Kent anyway.
So for me, the more powerful my characters become, the more corrupted and Evil. However, some have been burnt from too much power and now shun it.
I have a burnt out ex-queen, who can manipulate Love. In an effort to obtain the throne, she killed her lover, put her child in an orphanage and made the king fall falsely in love with her, all by magic. It gave her a bitter, false, ash filled prize. Now that her king whom she never loved is dead, she is uncertain who she is, what she wants, what she has become and how to make amends. She is very cautious in using magic ever again.
And now she is attempting to rob a bank in an effort to win the only man she really loved, the one she could never charm.
Anyway, enough about me. So why isn't Superman God?
(And yes, I know there are anti-superman comics where Superman is a USSR communist - Superman Red Son, or an old man. I find those far more interesting if not just as flawed by Superman's perfection.)