Favorite Games:

Mega Man series (This includes the Original Sub-Series and the X Sub-Series. I have no interest in any of the EXE/Network games, and I have little experience with Zero and ZX. Zero and ZX seem cool, but I just haven't played them that much yet.)
Zelda series
Final Fantasy series (2j, 8, and 12 are terrible though. No interest in 11 or the Crystal Chronicles Sub-Series)
Starcraft (!) (stay tuned for SC2!)
Warcraft series (Yes I played WoW for a while, but I prefer the RTS's)
Super Mario series (this includes all the Mario side-games like Kart, Tennis, Smash Bros.)
Paradox Grand Strategy Series (Europa Universalis, Hearts of Iron, Crusader Kings, VICTORIA, etc.)
Civilization series
Galactic Civilizations 2 (and expansions)
Total War series (I'm still divided on the last two though. They seemed so much more.. arcade-y than STW and MTW)
Street Fighter series (especially Street Fighter Alpha 3)
Castlevania series (but not the 3d ones.. they're all terrible)
Ninja Gaiden (The NES ones! I'm curious about the new ones, but I don't have either Xbox or a PS3)

Basically, I like strategy games, some fighting games, RPG's, and old school platformers. I like RPG's less and less though. I play some FPS's, but I wouldn't say any of them are favorites of mine.

Other games I play often:
Devil May Cry series
Guilty Gear series
Time Crisis (I actually own TC 1, 2, 3, and Crisis Zone for the PS/PS2)
Shinobi series
God of War (Only played the first, but I'm guessing the others are sweet too)
Streets of Rage series (Where is a modern beat'em'up when you need one?)