Cool article! It's great to read such an interesting viewpoint . . . I have always played horde, and have a special place for them in my heart, but do not hold any particular hatred for the Alliance. I'm a big lore-nut, and I know that despite their appearances and blood-strewn past, most members of the horde are, as you say, victims who have banded together. The level of inter-racial camaraderie and trust within the horde (for now...stupid war-mongering Grommash) has traditionally been much stronger and more strait forward in the Horde. The alliance has held together because they had to...Elves and Dwarves would have nothing to do with each other if they could help it, and humans are arrogant and standoffish to non-humans by nature.
Granted, the forsaken have not always had the horde's best interest in mind, but Sylvannas at least has proven to be loyal to Thrall. That Thrall would be so willing to welcome such a wide variety of people in harsh situations, and then have them continue to prove loyal to him, shows him to be the excellent leader that he is (His story and character are my favorite of WoW lore).
Sadly, peace is boring to most people, so that's all going to be shattered alongside the world in Cataclysm.
In the end, Horde are more interesting to me because they are NOT human. I am human every day, why should I want to play one in a game like WoW? I DO generally find them to be more mature, and though I may not find orcs/tauren/trolls/undead particularly kissable, their character and strength appeal to my heart and have created in me a loyal member of the Horde. Lok'tar Ogar! I am a nerd!
-Nhihira, tauren druid, of The Unbroken on Steamweedle Cartel.