You've got alot of energy and talent. I hope you eventually grow away from the cliche, death metal stuff. I see so much of it from guys about your age. Is it really rebellious if everyone is doing it? How about doing something so far out and embarrasing that only you, of all people, could do it.
I like this drawing of yours. Crude, sexist and politically incorrect. Rather stupid and ugly in a beautiful way.
I think you'd like and should look at the work of Peter Saul. The French gallery below had a big exhibition of his work and published a catalog.