Too bad there is no genre selection for sub cat for dubstep, like chillstep n creepstep n drumstep, etc. Like I said earlier, you don't lack the skill bro. This is some smooth shit. I'm lovin it. All I can say is what I'd do is, add in some adlibs ...well that's what I call them, it really doesn't have to be vocals but little pops to add into the ambience like my track here..... even though i just now checked it and someone 0 bombed the hell out of it was a 5 freakin star anyway...... lol sometimes gotta hate the NG raters, randomly 0 bombing your stuff. but anywho yeah check this out and you will know what i mean.
http://www.newgrounds.com/audio/listen/591004