I will focus on my current mage and druid first.
As for leveling a new character, I've been tempted to roll a troll shaman lately. According to the twitter chat, Blizzard seems to have some brownies in store for troll and gnome leveling so I'll probably wait and see how this goes.
Worgens and goblins don't really tickle my fancy, but I'll roll one of each to check the areas.