I would say to lose the fanny pack, or whatever that thing is, and also get rid of the the smiley pin. That's Watchmen's trademark. The two strands of hair on Joker that are sticking out look like you're trying too hard to make it look anime.
Remember, just because many anime artists use the staples of manga style (spikey or crazy hair, huge muscular shoulders, massive eyes, little detail), that doesn't mean that you should follow that same format. It begins to look lifeless and cookie-cutter. It'd be great to a style that was inspired by anime but really is your own signature style. Don't feel that you have to follow a set of rules and boundries that were founded by other artists.