The fuck, Ultima Online is still around.
And very alive, as well. Both on the official EA servers, and the veritable standing army of freeshards available. For those who wanna know, I play on UOGamers: Demise. 100% free, almost up-to-date with the EA servers and their content...it is missing a few things from Stygian Abyss and upwards, but there's still a LOT of shit.
If ya don't mind olde tyme graphics and like games with a hell of a lot of freedom, look no further than Ultima Online. However, to all prospective newbies, two warnings: stay out of Felucca, as you can be player-killed anywhere outside the reach of the town guards in that world, and avoid Ilshenar until you've got really good kit, stats, and skills. I'm talking Master level (90-99%) skills, at minimum. Ilshenar not only has a LOT of hostile mage-type mobs, but its the only world with Paragon critters, which are an order of magnitude stronger (and faster) than their normal counterparts. A Paragon zombie might be a laughingstock, but a Paragon dragon? Lemme put it like this, about 18 months ago, I had a mage character that could rip apart regular dragons with hordes of angry magic bees with casual ease, and she had a hard time killing Paragon dragons.