Depends. As I don't understand japanese, it don't sound bad to me when it is, and I cant fully appreciate the good voice action even though it often sounds good overall. As for dubs, there are several I would take over watching subs, and there are also those that makes my ears bleed when i listen to them. They are usually more extreme, swaying widely in one direction or the other. There are of course also bad subtitles that does make it a real pain to watch the original audio track, no mater how great the japanese voice acting is.
I can watch either one. It completely depends on the anime, but if its a tie, I rather watch it dubbed, so in that regard, I guess I tend to like dubs more, although I don't really mind either way.