I still haven't fully decided what I want to play for Mists remix. I have too many options, since I only have 3 level 70s(mage, warrior, shaman).
I'm leaning towards human ret pally, for that generic hero flavor. The last time I played a human was Legion I think, and I still haven't done their heritage armor quest. Or maybe a lightforged draenei? I kinda want to make her a dwarf, but my main is a female dwarf mage, but my shaman and warrior are also female dwarfs!
I could also try a hunter -- it's a class I keep trying to get into, but I find that their attacks lack impact and aren't very satisfying. I do like the collecting of pets though. Maybe night elf, though again, a dwarf would be better lol