I just started doing it almost two months ago. I haven't been playing world of warcraft for long either, maybe four or five months, I've got one level 80 character on a different server to where my 5 boxing team resides. I can't remember why I decided to start doing it, probably something to do with instance queues and/or wierd random people in instances. Also I want to see as much of the game as I can before it changes in cataclysm, it's much easier to do that with five characters than one. Also my characters seem to die less often while questing, I can take my time during instances and really explore them fully without being rushed by other players who've been doing it for years. I've grown quite attached to my characters as a group, but its still fun to play a single character without the team, mostly in pvp though. In game get varying degrees of abuse from people because I have five characters, I can't say I enjoy that type of attention, never a dull moment. Going forwards I can't imagine not doing this, when cataclysm comes out I'll proabably get four copies and one collectors edition, but I hope cataclysm doesn't come out for a long time.