I like dubstep but I've pretty much had my fill of it in trailers now. It makes sense for some titles like Syndicate - for one thing it's a futuristic shooter so a bit of wub suits it quite nicely, along with it being a reworking the original theme tune by Skrillex. On the other hand, I found the dubstep in the Fary Cry 3 trailer to be a bit grating. I just don't think the marketing guys for that game really needto jump on the dubstep bandwagon. Seems silly to me.
...I did kind of enjoy the Borderlands 2 trailer though.