(partly in response to Macabre in case the reply system doesn't work)

Well in my case there's a C) all my friends are still playing WoW. If you're in a great guild full of great people, you don't have to deal with the rest of the community.

Of the games in the list, I've played max level content (at the time I was playing them) in EQ, EQ2, WoW, and LOTRO, and am currently subscribed to both WoW and LOTRO. I also play Guild Wars and Free Realms on occasion.

In my opinion, the PUGs in EQ were the best. Although I love soloing and mostly play that style, I do admit being able to solo makes it hard for new players to learn how to play in a group. I probably just got lucky cutting my teeth on EQ, but there were very few times in that game where someone was just totally clueless in a PUG. EQ2 is a close second. My experience with LOTRO is that there are a lot of new players who enjoy it for the setting but aren't really very good players in groups. And WoW--I enjoy the content and being with a great group of mature people in my guild...but I will never join a PUG in that game ever again.