it could have just been his gamma, or even his monitor (my sister's monitor is twice as bright as mine, neither of us have messed with our gamma, and both of our monitors are brand new. we have the same videocard)
And yes, I would highly suggest WoW. I was in the stress test, and it was, quite frankly, one of the best games I had ever played. Then a few months after the stress test ended I got in the open beta, and they had managed to make it better . I can only imagine what it's like now.
I beta tested TMO, and I honestly couldn't stand it. It ran like crap (the graphics weren't even impressive), and the interface was awful. The game seemed to play like CoH minus the fun. They very well may have improved it since then, but regardless, I would go for WoW.
Moo.