I Am Completely Serious

I've honestly never seen a lot of difference; the plotlines for both mostly range from boring to irritating early on. Thrall was definitely the most sympathetic of the race leaders, when that was his job, but it didn't affect much given that 98% of the time he was sitting in a chair in Orgrimmar, and you were somewhere else doing meaningless kill-and-fetch quests.

Basically I think they need to hire some actual writers, who can write, and just put them in fucking charge of everything for a while. They could hire a few cinematographers while they're at it.

The only exception to my general disdain for the game's plotting is the first ten levels of the Worgen content, which I just played through for the first time today. And I am astonished that Blizzard actually made me care about what was going on for a couple hours. I've stopped now, though. Done caring! I killed two (2) rebellious lords in aid of nebulous goals, and was given a top hat for my pains.