For me it would have to be the remakes, it is really fun to play and advanced version of a game I played as a younger kid. I logged so many hours on that beast, and restarted countless times again, Though it does show me how much hasn't changed in the game, and how much information I have retained since the old games. I am a fan of the newer games, R/S/E but they just don't have the nostalgia effect like the others do.
Nex :)