I like how expansive the multi-verses are in DC and Marvel.

I actually generally like the practice of (creative) ret-conning. I feel like it let's creators be freer to push the envelope in powerful story telling. (eg Writers freer to kill off a major character)

I also like watching police dramas, so I think just the basic heroics also speaks to me.

I like the idea of having a nemesis or a rogues gallery.

Oh and secret identities... I like the idea of living a double life with a secret identity. The more closely guarded the secret, the better.