Warlock - because he's a wizard
@hh: The Glide the Warlock has is way more versatile than the double jump, you can even shoot while doing it.
I'll second that. Having played a little as a hunter and maining all the way to lv 8 with the warlock, I'd say you have way more mobility with the latter. Tapping the jump button in succession allows for a sort of super glide jump. It basically let you fly around the map, whereas the double jump feels less effective comparatively in that respect.
fair enough, but is there any indication yet of whether the upgrade paths let you enhance these particular skills at higher levels?