Some of my favorite games were the Kings Quest Series for PC I grew up playing number 5 and 6! Also Ecoquest was a blast, also a PC game. I now own most consoles ever made, and tons of games for each console, from old to new consoles and I have to say my heart remains with a lot of old PC games, I didn't have anything except an old Packard Bell computer until i was a teenager, and I loved playing those old games on there. A few good ones were: Dark Ages, Jurassic Park (original pc game), The Exile Trilogy (have spent hundreds of hours on these ones), Dreamworld, Quatra, Oh man the list could go on forever.
Xbox: Tony Hawk Series, Timesplitters 2, Unreal Tournament 2, Dynasty Warriors Series, Red Dead Revolver, Gun
xbox 360: Assassins Creed series (this is my fav series for none PC games), Halo Series, CoD Series, Monopoly (was just straight fun), Soul Caliber Series, the new Mortal Komabt game (It's kills are wicked awesome, and the x-ray hits are too)
Sega Genesis: Primal Rage, Sonic Series
Nintendo (NES): Mario Series, Duck Hunt, Legend of Zelda, Paperboy, Punchout
Super Nintendo (Super NES): Super Mario World, Out Of This World, R-Type, Top Gear 3000, Star Wars Series, Dr. Mario, Donkey Kong Series, Mortal Kombat, Earthworm Jim, Ninja Turtle Series, Street Fighter Series
Nintendo 64: Super Smash Brothers, Turok Series (Rage Wars), Hot Wheels Turbo Racing (was wicked awesome), Mortal Kombat Series, Command and Conquer, Gauntlet Legends, Golden Eye 007, Kirby The Crystal Shards,
Gamecube: Super Smash Brothers Melee, Turok Evolution, Mario Party Series
Game Boy: Mario Series, Zelda Ages And Seasons, Pokemon Series, Megaman Series
Game Boy Advance: Final Fantasy Tactics Advance, Pokemon Series, Megaman Series
Nintendo DS: Wario, Pokemon Series (The newer ones have so much to do now, its actually very impressive)
PlayStation: Twisted Metal Series, Monster Rancher 2, Rock The Rink, Final Fantasy Tactics
PlayStation 2: Tony Hawk Series (Mainly American Wasteland though), Monster Rancher Series (EVO And #4), Tekken Series, Mortal Kombat Series, FIFA Street, Final Fantasy 10
Nintendo Wii: CoD 3, Carnival games, Wii Sports, Ninja Reflex (annoying as it is)
And I could never forget the many many many hours spent in a REAL ARCADE[i] as a kid!!!
Arcade games: Any Basketball shooting game, Metal Slug, Gauntlet Legends, Basically any shooting game, and the little BB gun looking game where you shoot the tombstones down (can't remember the name), TIME CRISIS Series, Alien Resurrection, Claw Games, Pac-Man, Bust-a-Move, Rampage......... Again this would be a very long list as well, I loved going to the arcade as a kid, still do, even though they are much rarer now.
New PC Games I love are: Zoo Tycoon Series, Roller Coaster Tycoon Series, Sim City Series, Age of Empires Series, Empire Earth Series, Command & Conquer Series, Sid Meyers Pirates, Oasis, Virtual Villagers, man this again is a very long list as well.
Well that's the tip of the Ice Berg for games that I have enjoyed over the years, I may get on here and post more another day.
Let me know if you remember any of the older games that I listed.