I know exactly what you mean. I seldom totally replay a game over again, but Nintendo games always bring me back for some more of the fun. I'm still playing Kirby64 over and over, in Metroid Prime I like to just go back and walk around, SSBM. . . lots of playing for this, Luigi's Mansion I'm playing over on the Hidden Mansion, Star Fox Adventures I'm playing over because one of my saves is stuck in that palace place with the fans, Gauntlet I almost never play (beat it and have a level 99 Jester with plenty of all items), and I'm currently trying to finish the Nintendo Gallery in Wind Waker (only 3 statues away from finishing), so I've beaten the game once and gotten up to the second Forbidden Fortress twice. Mischief Makers for 64 is also a great game for replay, as are most of my other 64 games.
So, no I don't technically replay the game, but Nintendo, and occassionally others, keep me coming back for one thing or another.