ok well my current headphones are my amperiors, hd650, and he400.
on the whole, i'd say my favorite overall are the hd650, very very very very closely followed by the he400. the thing is, i just love the bass on the he400. it's perfect. altho the hd650 seems to go lower, the impact of the 400 is swag. amperiors are also very nice, but they are closed so soundstage suffers---i do like a big soundstage.
i listen to a lot of hip hop (rap), rock (alt/indie/punk), and club music (electronic, mainstream radio stuff, etc). classical occasionally. i do like some vocal tracks but not many. for example, i enjoy skyfall by adele, but i hate all of her other tracks. idk why.
i own the dunu tridents, which i do like, but not as detailed/textured/extended/spacious as the other three (obviously). basically worse in every way, but i still like them.
also have the philips she3590. awesome for the price, but mids are a bit lacking for me.
also the jvc ha fx101. waaay to bassy for me. if 650s have a veil, jvc sounds like i have a carpet on my head.
so i guess overall, i like neutral with a hint of warmth. my favorite headphones (hd650 and he400) both follow that sig, and so do other hps that i like (dunus, amps).