Oh, definately. If you're not the healer type, then Priest or Druid isn't the class for you, but don't go rogue or hunter unless you just can't stand the other classes. In my guild, mages and warlocks seemed to always be in pretty short supply, though that may not happen universally; I know that guilds are full on rogues and hunters, though, because even PUG UBRS raids get broadcast as "LFM UBRS, full on hunters and rogues" . . .