The first 1:30 had no drive. The drums didn't have that hesitant awkward swagger (yes I'm using that word properly) that they're known to do in this kind of mainstream dubstep song. Try didn't variations of swing patterns, 16th, 8th, etc, see what compliments the track. Also reduce the velocity on the less important kicks to keep the drums from sounding super robotic.

We all love our snares powerful, but I think you might be overdoing it just a bit. The contrast of the relaxed piano/synth/string lines and the super-intense snare might be what killed the forward moving feeling that you want at the beginning. Also try some harmonic minor notes (the tonic -1 for instance) on the last chords of the sequence to get that super edgy about to drop sound.

The drop itself was awesome sounding, but not headbangin'. Why? Well, my best theory is because the rest of the song was the same volume as the drop but less intense, so the drop actually felt weaker/smaller than the relaxed part because it had less space (reverb). Basically, if you didn't introduce the drums as a massively powerful element until the drop, it would flow better. Headbanging is definitely something you want to happen at the drop.

The second drop was too sudden to catch us. At least give us a bit of reverse crash if you're going to be sudden like that. You're trying to make us go "OH SHIT NO HE DIDN'T" not "oh, and suddenly drop happens" if that makes sense.

Yours truly, some random person on NG.
Check out some of my music sometime if you're interested.