One of the very few superheroes that know Daredevil's identity!

Spider-Man.

Batman, he's dark, brooding and still very much human underneath the mask and cape.

SpiderMan.

Spiderman!!!

This is a trick question. My answer is The X-men. I know that doesn't really make sense but them as a whole, their issues, the characters within, everything about them I love.

Now breaking it down a bit more to actual individuals.

Heroes:
Machine Man - Actual android, trying to be human. Unlike the synthetic AIs like Ultron or Vision, his AI is true AI. His depiction in Nextwave was a little odd and it was carried on for some reason but I still have a fascination with anything AI... mainly because writers know nothing about it and get it wrong every time. :P
Captain Britain - Because he's Britain. :P Also, I like the mythology around him. Him and Meggan are a great due. if you can, you should read Alan Moore's Captain Britain work.
Iceman - He's one of the few remaining true good guys left. So many kill or do questionable things to get ahead. He is honest, unselfish and does what he can even if his subconsious is holding his powers back from become godlike.
Professor Xavier - even though in the comics he portrayed as secretive, underhanded or shady, he does nearly everything he does for the greater good and has helped so many people.

Are we allowed villains?

EDIT: Id' actually like to know how many people know who X-statix are.

Edit: Oh and Rogue.

Not a fan of superheroes. I find them boring, antiheroes and super villains are much more interesting. But if I had to only go for a superhero. Probably Spider-man

The popular answer is Batman--and he's been my choice since the late 90's JLA reboot.

In the early 90's, my favorite Superhero was from Malibu Comic's "Ultraverse". His name was " Prime". The whole universe was pretty great but Marvel bought them and the universe pretty much turned to shit before (thankfully) ceasing to exist.

You're kidding, right?  Daredevil's secret identity gets revealed every Thursday!!

http://www.manwithoutfear.com/daredevil-secret-identity.shtml