Way too many to mention...

I've got 37 game shortcuts on the desktop at the moment. Not counting the 3 FS versions and all the stuff surrounding those, probably 45+ games installed...
Most hours, besides FS, has been spent in Total War series, SWAT series, U-boat simulations, everything ever produced by Sid Meier(!)...

Most recently I've been playing through a lot of the stuff available on Stardock, with GalCivII and Sins of a Solar Empire as flagships, but a lot of small, older, independent games as well.
Mostly strategy and simulations, rarely RTS or FPS.
Sadly, as a student (again) since a year, I now have no money to spend on new games.

(I actually share my gaming interest with both my parents who are 60+ now.)