Do you have a strong preference, or does it depend on things like you're mood, how much time you have to play, etc.? I don't mind a little bit of single player stuff, especially if I'm cranky or don't have much time. Overall, I've had a better experience playing multi player content.
WoW just isn't as much fun when you're not playing it with others.
WoW just isn't as much fun when you're not playing it with others.