Okay, the Orcs have gotten their straight backs, but unfortunately their is lore preventing the same for Darkspear, but I'm pretty sure I'm definitely not the only one who would play Dire Trolls if they were available, I mean just look at them
Though it should be noted that their not all that big, I'd say if they were made an option, they'd be about the size of a Tauren
Why, would we be able to play a Dire Troll you may ask, well from what I understand, Dire Trolls can potentially be born that way, though some become like this through magical or alchemical manipulation, I also should note that certain trolls can become Dire Trolls at will, so this is not something that can simply be an Allied Race
If Blizz ever decided to give this to Trolls, I'm sure they'd be very popular if done right
Edit; THIS IS A OPTION FOR REGULAR TROLLS, NOT AN ALLIED RACE