The score of Sin City was done by Robert Rodriguez, Graeme Revell, and John Debney. Rodriguez composed the theme and most of the tracks. I'd recommend looking it up on YouTube or something.
Return of the Joker- I agree with you, I don't like all of it, but what I do, I love.
Spider-Man- Again, I agree with you, it's not complete gold from beginning to end, but it has solid music, like the theme, not as memorable as Superman's or Batman's,granted,but I really like it, the music that plays when Peter is designing his costume, the music for the big montage of Spidey saving people in the middle of the film,the last track and the end credits.
Batman Mask of the Phantasm, Superman Returns, and Spider-Man 2- I don't know, man. I prefer music that I can listen to on its own, rather than being so tailored to a scene. Expanded scores just have a lot of fat that I can do without.
Incredible Hulk- I'm talking about the 2008 film, I haven't listened to the one for the TV show yet.
Special mention for Catwoman's theme in Batman Returns. Just beautiful.
As for soundtracks, I mostly listen to Disney musicals:
Moulin Rouge-One of the few non-Disney musicals that I love. I can listen to Your Song and All You Need is Love all day,though they a lot of bad memories attached to them now.

Beauty and the Beast-A lot of good memories with this, as we performed this at school last year. I played Cogsworth, and I can't tell you how hard it was to move with a large cardboard box painted like a clock strapped to you.
Tarzan-Takes me back to being a little kid again.

That's about it. Oh, and I have a compilation of different versions of the 60s Spider-Man theme. It's made up of
*The original
*The Ramones cover-Meh.
*Aerosmith cover-Don't like it at all.
*Michael Buble cover-Love it. My favorite version of the theme.
I'm sure I'll find more when I relisten to the old episodes of the Spider-Man Crawlspace.
Edit:Latest scores and soundtracks I've listened to recently
Assassin's Creed 2 by Jesper Kyd-Love this. Captures Renaissance era Italy.
Dissidia:Final Fantasy
(500) Days of Summer soundtrack
Thanks for the greeting! I hope I have fun here.