If I haven't seen or heard the final score of a game I want to watch (pretty much only BYU football or dodgers playoff games) I'll watch it on dvr that night.
If I don't get to it that night, I'll check the score and move on with my life.
I've never in my life gone back and watched an old recorded game of anything. Highlights or bits and pieces of a game, maybe. But never a whole game just for the heck of it.