It definitely has a unique sound to it, but some of the instruments you use are too... I don't know if there is any right way of putting this without sounding like a complete idiot but... they're too 'default' sounding, like you just picked instrument to fill in the spaces. It killed the variation, and so there was a single flow throughout the song, which left it kinda dull. I'd suggest turning up the volume of one dominant instrument during each drop, and down the others during the rest of the song to make the drop sound even more important. It also was missing clarity in the attack of each sound. I'd suggest using the master control to add the SOUNDGOODENIZER in FL Studios, or if you have Audacity, you could just run it through a Notch Filter and Compressor Filter (based on peaks). Its a bit more editing, but if you have only free ware, that is what would help a lot.
Don't get me wrong, I still liked the piece, and respect and appreciate that this IS your first Dubstep, which is hard to make especially if you don't know you programs, but keep in mind this is only advice.
The sounds were sick nasty.
The composition is pretty cool.
In my opinion, it's over-compressed (causing it to loose dynamics and punch.)
As for general originality and content, it's not my style.
Please contact me if you would like to use this in a project. We can discuss the details.