I have some sports simulation games on my DOS computer that I like to play. I have a game called Big League Basketball which simulates NBA basketball, also have APBA's hockey game which simulates NHL hockey. For the basketball game, I have every NBA season from 1986-87 to 2003-04. For the hockey game, I have only two NHL seasons, 1974-75 and 1975-76, but that's good enough for me, those are the only seasons I want.
It's fun to play these games, simulate past seasons and see how close the results turn out compared to the actual season.