I'm an admitted Horde lover, and I think the Alliance entry is better. As mentioned many times before, it's far more welcoming and unity-inspiring than the Horde's army-recruitment style crash course. I wish I got to spar with Garrosh (not just because I want to punch him in his face), fisticuffs with your leader's just a cool thing to do.
If you're not excited at the prospect of Varian becoming more familiar with his men and interacting with him one-on-one, that says to me your cries of "WAAAHH! BLIZZARD IS BIAS!" come more from hatred of the Horde than love of the Alliance. And to that, I say "Grow up."