I played quite a bit from launch until BC, quit to play Hellgate:London (lol) and then started playing again just on my 29 and 39 twinks, then quit again to come back for a couple months during Cataclysm. I had a couple 60s, with two being on the Horde side of the NA-Arthas server and two others on the Alliance side of the NA-Magtheridon server. I did all of the 40 mans in vanilla and a lot of guild PvPing but got out of raiding once I hit 70 in BC, where I found PvPing with my 29 Druid and 39 Rogue to be much more fun than spending hours sitting (and usually wiping) in instances, especially since I was in one of the better twink PvP guilds on the NA servers.
I did notice when I downloaded the Blizzard launcher that my WoW account is banned for unknown reasons, so at least I have that!