I find this hard to answer. I am not sure my adult-self has a favourite superhero.
When I was a little girl, I was obsessed with Supergirl. I loved the film. Having re-watched it as an adult, I realise it was not the best film ever made!!
My sister-in-law and brother-in-law recently bought me a wonder woman jumper, which I love. Perhaps she can be my favourite superhero now?
The monkeys have definite favourites. Bob D loves Batman and Bob L loves Superman.