KariudoMegami
Personally speaking, I prefer DPNs. I've tried circs, but the wire kinda annoyed me, and I didn't like the transition from wire to needle. However, I've only tried knitting on not-very-expensive circs, and I've been told that it can make a difference. *shrug*
I also have that trouble with circulars. Personally, I prefer straights, but I do have some experience (and more success than with circulars) with dpn.