So I've noticed that between you and I, we think of dubstep very differently. Because of that, I don't think that I can take criticize your songs too much, so I just have two quick things to say. First, the structure is kind of buried. I can obviously see the intro and outro, but everything in between just sounds like a drop except for a small midsection at 01:35. Secondly, there's that auto-panning happening the entire time, and it just gives the song a bit of a monotonous effect.
We don't have the same tastes, so if you think that this song is a really good song, then disregard me. It's probably good. I'm just saying that I personally don't like it too much, but in the context of YOUR songs, my opinions are rather worthless as long as you're making music that sounds good to you. :p
Lot7even 
