I loved Sprint, Punch-Out, Galaga, Dig Dug, 1942, Centipede, Pole Position, Tempest, Pac-Man (all versions) and Defender. Never cared for Donkey Kong though.
Most if not all of these games can be made to run on a modern machine although the more modern your computer is the more tweaking you'll have to do IE if you're running XP and an onboard sound card you'll probably need a DOS and a Sound Blaster emulator.If you've got an old clunker gathering dust in the garage you're in luck These are all legal shareware demos with three to six levels each but with that many games it'll be a long time before I feel like shelling out the big bucks for a full version.There are allot of other of games on this website from MS.Pacman to Tomb Raider or a couple or 3 different Asteroid clones.
I am in no way affiliated with www.dosgames.com I'm just letting you know that if you miss your old games they're all out there on the net and most of them are free.Also I have never got a virus from www.dosgames.com but use common sense when downloading and installing stuff from the web.Resident spyware shields up, virus scan before you install.
Happy blasting