I used to listen to Hardstyle, Gabber, and even the Hardcore channel on di.fm. But I just sorta grew out of that stuff for the most part. Well, that, and I MUCH prefer the classic Gabber sound to the new stuff (Thunderdome CDs, if you want to hear what I mean. My favourite being Thunderdome 9, but that's a hard CD to get a hold of.) Now I listen to the Drum and Bass, Techno, Oldschool Electronica, and very occasionally, the Classic Trance channel.
I don't mind dubstep (some tracks are pretty damn awesome) but I can't handle too much of it at once.
I just really wish di.fm would get some goddamned IDM channels already.