I loved leveling my Hunter, the not-so-fun bit is raiding with her. Heroics are a blast, though.
I think part of it is that it never really feels like you're alone, because you've got a huge ferocious ball of fur or feathers following you around and making all those mouthy melee mobs pay for crossing you. I know I tend to get pretty attached to my pets, and most of them have personalities and backgrounds of their own.
Plus I still totally love Pokemon, so.... Anyway. How's it going for you so far?