I began my gaming career on my dad's Intellevision, though it took awhile before he trusted me enough to play with it!
Here are some of my favorites... though most of you will have no idea what any of them are...
NES:
Xexyz
Contra
Werewolf (Impossible to beat... almost
)
Milon's Secret Castle
Ninja Gaiden series
Dark Wing Duck
Blaster Master
Double Dragon series
Batman: Revenge of the Joker (Amazing and addicting)
Sega Genesis:
X-Men series
Shinobi 3: Return of the Ninja Master
Sonic Spinball (EXTREMELY HARD GAME)
Vectorman series
Shining Force series
Phantasy Star series
Turrican
Mega Turrican
Ranger-X
Landstalker (1 of top 5 all time faves)
Chakan
Beavis and Butthead
Contra - Hard Corps
Gunstar Heroes (AMAZING game)
Road Rash series
Light Crusader
Robocop Vs. The Terminator (Sega and SNES are different games)
Ys 2: Wanderers from Ys
SNES:
Super Metroid
Zelda: A Link to the Past (best Zelda ever)
Secret of Evermore (1 of top 5 faves)
Secret of Mana 1 & 2
Final Fantasy 6 (was 3 on SNES, but really is 6 in series) (#1 RPG of all time)
Chrono Trigger
Contra 3 - The Alien Wars
Robocop Vs. The Terminator (Sega and SNES versions are different games)
Super Mario RPG: Legend of the Seven Stars
Terranigma
Dragon View
Super Star Wars series
Lufia series
Lagoon
Secret of the Stars
Breath of Fire series
That's my big ass list... OH, and though I doubt anyone here knows this, and it's not really old school, but the most addicting game I have ever played... Sega Saturn's DRAGON FORCE!!!!!