Well, I actually just started MBing, and got my girls to the 30s now. I'm actually a DPS lover, I really enjoyed lvling my frost Mage and my elemental Shaman (..single-boxing... eww :P), so I decided to roll with five Shaman girlies
But yeah, the 30s are rather slow, STV, however, is a great area to lvl your toons up quickly ^^