I have a trove of games that I can't imagine not replaying. I'm always going to be going back through FF1-12 periodically, along with Star Ocean 3, Mega Man Legends, and a few other classics. But with newer games, I find the urge to replay them fading. I've only beaten XIII and XIII-2 once each, and I don't really feel like picking them up again. I borrow games from a friend sometimes (Tales of Vesperia/Graces f/Xillia, Xenoblade) and only really intend to try those out once (although Xenoblade is worth having around forever). But as far as I'm concerned, there will never be a day where I'm done replaying any old favorites.