As a comic book collector for the past fifteen years, I have to say that fianlly seeing the heroes on the big screen (and done well) is a welcome change in my household. I collect everything from the mainstream titles (mostly Marvel titles, like X-Men, Spiderman, and a few others*cough*downwithDC*cough*) to horror comics to alternative (well, ok, I'll take some DC Vertigo titles...Sandman, Preacher...). I even used to take some of McFarland's crap (yes, I said it, I think McFarland is a *hack*).
Personally, I think it all boils down to the characters. As a universal example, let's look at Spiderman. Yes, his history has been mangled over the past 30 years by the beurocrats at Marvel, but at his core, Spidey's just everyman...with a little extra. When The Venerable Mr. Lee came up with Spiderman, he wanted to create a character that would appeal to everyone -- teen outcast struggling with school, friends...life in general. Who hasn't, to one degree or another, struggled with these issues himself or herself? Now, let's throw in P. Parker's brush with destiny - the infamous spider bite. As if he didn't have enough problems, now he has to deal with these superpowers, and the internal struggle that comes with them. Should he use them for the good of his community? Should he hide them? Should he use them for his own benefit and the benefit of his family alone? Oh, let's not forget, the guy's still a teen (at least when The Venerable Mr. Lee created him) and he's got these very adult issues to deal with. If that's not good, strong character development, I don't know what is.
To me, that's what it takes to make a good movie. Sure, the new Punisher movie had lots of explosions and gunfire and manly stuff, but let's face it -- the Punisher is a lame character. Both movies made about him have been flops. (Yes, yes, I know, you're saying, "Hey, now, wait a minnit! Frank Castle's got a back story, too, you hypocrite!" He does, but it affects his continuing story very little compared to Spider Man.)
I say bring on the heroes. I'm counting the days until a Preacher movie is made/finished/released. I'd also like to see a modern Captain America flick...I think it'd work. I also like the X-Men properties, and think that, while the origin stories on some of the characters were not entirely correct (...understatement...fangirl alert...) the handling of the characters were authentic, well cast and true. These are characters that all have...well, character. They have flaws, but believe in themselves and their causes enough that they struggle through their flaws. Look beyond the CGI eye candy for the true stories (I swear, comic books are soap operas for men) to the real struggles the characters go through. I have grown through comic books as a person...give 'em a chance, you might, too.
WVWG
(P.S. -> There's an exception to every rule. The Hulk. Ugh. The movie futzed around with his origins so much that the only thing that remained true to the story was that he was big 'n green. 'Nuff said.)
(P. P. S. -> As far as comic book movies being true to their origins, you can't get any closer than Sin City. It was almost like the actors were using the comics as crib notes between scenes. Superb. Excellet. Bravo.)