Go play Everquest.

There are like 19 expansion to play though, lol. You can go back and solo/merc/box all the raid content in every expac by outleveling it by 10 levels (Think they are up to 105 as the level cap).

Endless amounts of xp grind with AAs, and the world is so big it would take years to visit all of the locations.

And the graphics suck so bad you can buy 6 accounts and have a 12-man raid team with mercs on a single computer, and they "allow" you to use ISBoxer.