Ah.. good ol' UO. That was my first MMO, like 8 or 9 years ago. I stopped playing when they started updating the graphics and my poor computer and 56k connection couldn't handle them. If I knew where my disk was, I'd probably play that to kill some time, though it would suck to have to re-level my character back to where it was when I quit. *sigh* Ah well...
I have yet to find another MMO that could hold my attention for as long a time as UO did. With any luck, WoW will be able to, but who knows...
Fable looks awesome, though I don't have an X-Box, so I don't believe I'll be playing it.
Once my new computer gets here, I'll probably kill some time with Doom 3, though I don't know how long it will take to get through it. If it's anything like the first two, it won't take too terribly long.