WoW
is good, in a well executed format, and is a champion for the common man. I liked it when it came out, like a rough diamond, but now it's all a little samey.
Personally I've grown to dislike any game where the main objective is to grind mobs with the objective of getting ultra rare loot, gold, or finishing quest objectives. It's to much like a job.
I'll admit to trying just about every mainstream mmo to come out, they're all the same with different skins and minor mechanic changes.
Internet gaming was brought to the world's population by WoW. It's where subculture became mainstream. Those that played online before it will know that WoW isn't the only game where you can have friends and play as a team. WoW gives people that, and doesn't require you to have any prior knowledge or gaming skill to do it, which imho is why it is so successful.
Personally, 2 games I'm looking forward to in the new year are jumpgate evolution (Q2-3 release) and darkfall online (22nd Jan). No mainstream grind, just action and fun. Bring it on! :D