Solid attempt at dubstep! The basses are pretty good, this could be a really cool drop. A few suggestions though: the sub does not need to play the entire time, it can kind of follow your growls and wobbles so that it gives the track more movement. It could also be toned down a little bit. And the lead at 0:10 and 0:23, it sounds kind of plain on its own. If you put chords along with it I think it would sound fantastic. Just try staying in the right key!