Aye, WoW is good if you play with mates, Kotor 2 is also good.
You can also try Guild Wars, MMO, one time fee (when you buy the box), no monthly fee. StoneToad has it, and he's been waiting for me to get it too so we can play together.
(It also has WoW kinda PvP, for the warrior at least, AFAIK. So if you don't want to pay the monthly WoW fee, go with the poor man's Guild Wars ^_^)
Star Wars Galaxies sucks complete ass
I played it for the better part for like 9 months, or a year and 5 months, can't remember what year it was released ;x 2003 or 2004. Prolly 2004, so about 9 months. It's possible to grind just about every class (not sure about the Jump to Lightspeed classes) in a couple days (3 Days for ANY class, tops). And the new method of reaching Jedi is quite the suck (not to mention everyone and their mother is a Jedi now). Cancelled my account in December.