My favorites:
Driving games:
NFS: Porsche Unleashed.
Grand Turismo 4
Daytona - it is an arcade game that is simply wonderful. Old graphics, but lots of fun.
"Old Schoo" Arcade type games:
Millipede
Asteriods
Moon Patrol
Ms. Pac Man
Galaxian
Burgertime
Shoot-em ups:
Area 51
Miscellaneous
The Hive (Old PC game)
Super Mario World (Super NES)
Super Adventure Island (Super NES)
Firefox (Super NES)
Ace Combat 4 & 5 (PS2)
Spider Solitaire.
-Z-man.