This is just me, but WoW feels really similar to how Ultima Online felt to me. When I started playing, I thought to myself, this is UO w/ updated graphics and better endgame (read: any anygame outside of ganking and owning a home).
TBH..I still miss UO the most out of any mmo I've ever played. I still have an active account in the game, log on once in a while, etc. To me, no MMO has captured the experience like it did, dunno, too bad it sucks hardcore now.
I played UO for about 2years, and as much as I enjoyed it, short of playing with my brothers and close friends...it was pretty much a 1 player game. There was the PVP aspect but in reality all I ever did was things for myself, and things that involved solo or semi-solo aspects. The complete lack of a community, makes me only think thats all Ill be going to if I go to WoW, and I dont want that. If I want a well designed 1 Player RPG, or one that mirrors an MMORPG world, Ill play .hack or anything else.
In reality I left UO because it had nothing to hold me there any longer...without the people to come back to everyday, it lost its luster just like any 1player game will. Yes I was also on Atlantic server...name was Tristam Emrys. Doubt you remember me...as I hardly remember knowing 5 people in total the 2years i played the game.