Of all the playable races in WoW, which races (in design, WoW-storyline, etc) do you think Blizzard dropped the ball on the most?
I'm gonna go with Blood Elves. After playing TFT, I almost immediately made a Blood Elf when I upgraded to BC just because they were so badass in TFT, and I was horribly disappointed with how their model was, how unseriously a lot of them were taken, and how the badassness that I felt they were in TFT had disappeared. Stuff like Johnny Awesome and the Belf from the "Day when Deathwing came" quest don't really help either.
My 2nd place is Draenei. With all the unexplored lore with Argus, the betrayal by Kil'jaden/Archimonde, the Naaru, it's really disappointing that the Draenei have really been forgotten about.