Talking about multiple games now? Let's see here.

700 hours in Civ IV.
200 in FF Tactics Advance. (No shame.)
Several hundred in Paradox Interactive games.
I played stupid amounts of Starcraft: Brood War back in the day. Gotta be close to 500 hours at the very least.
Probably a couple hundred in SMAC-- this is my favorite game of all time but I never put as much time into this as I did with Civ because I never could get multiplayer working.
Lots and lots of Pokemon, of course.