Wizards are my favorite, they can pretty much solo everything, and with the most DPS in the game, farming pots is quicker.
ive also got into playing rogues too, although with rogues, u gotta either be extra careful or just solo when doing certain events or dungeons, because alot of people completely disregard a rogue trying to cloak, and its a quick way to die. just happened to me yesterday at a cube. as i was cloaked and rushing cube god, two warriors rushed too, and i got insta killed.