I don't really have time to REplay games at the mo, but I've always been a sucker for older titles (because it's not just nostalgia that makes them good).
I bought Speedball 2 Tournament, being a big fan of the original, but the EFFing thing doesn't work.
If there's anything I'm actually replaying, it's Sacred, though I'm up to Underworld now so it's not really replaying anymore.
Battle Isle: Andosia War's waiting patiently for me and Advent Rising will definitely get a replay when I've had enough of the others. I've played enough of Chrono Trigger to last me a while but I don't have it on this machine. If I ever get a DS though you know what my first game will be (I've got a few more endings to get, tho I've done the hard-as-hell ending where you get to talk to the developers).