Been gaming for as long as I have this is a tricky question, been thru way to many generations
First memories are playing this game, first game I beat too
Favorite though is one that I continue to play from time to time and always have to have a copy of
Some other favorites are:
FrontLine - Colecovison
Mega Man 2 - NES
Metroid - NES
Wing Commander 2 - PC
ID game collection, DOOM 1 and 2, Wolfenstein 3D, Heretic - PC
Duke Nukem 3D
Street Fighter 2
Donkey Kong Country - SNES
Mortal Kombat 1 and 2
Killer Instinct