Really nice model, though the arms could be a bit bigger (I see what you were going for, but since they're so long, they look distractingly weird) and the crotch hair looks like a penis, so maybe it could go all the way across it's waist?
Either way, those are just small suggestions and you don't have to listen to them. After all, this is your model.
This is exactly what a "troll" looks like in my mind in terms of the non-Warcraft universe.
Warcraft is the only place where "trolls" are thin, tall green things. Outside of Warcraft trolls are closer to what Warcraft "Ogres" look like, hiding under bridges and waiting to eat people.
Wonderfully disturbing and nightmarish, perfect for a horror game.
One of the most original models I've seen recently. Also very good use of ingame textures.
Seems well polished and works well ingame.
The portrait talk animations could use some work though. Looks a bit stiff and a bit too fast.
I'd also suggest using a more monstrous death sound, but that's just me