I'll be the same place as Cath and his hord of altsI will be playing with the guildmates I joined in Rift so will have the social side which is what MMO are about imo. In Eq2 I had 9 max lvl chars so repeated the same quests plently of time and still enjoyed it until the game got too easy. I like a challenge in games and will be on a pvp server with the guild where we plan on organised RVR with a guild we know on empire so should have plenty to do.
Going off my experience with Diablo in the past quests are minimal with loads of guantlet like running around and killing so its not likely to hold my interest as long though in the short term will be lots of fun.
Time will tell I guess.