The intro drums definitely need some work. I like how they sound in the body of the song though. However, the song as a whole is lacking that crunchy, "punch in the throat" sorta sound. Starting with the guitar, it sounds like it's in a tin can. Try boosting the bass on them. And I think the kick drum could be a bit boomier... or louder or something.
Anyways, I like the riffing.