I mean there is
a lot of things to do in just one single video game alone to keep you busy, different difficulty settings, playing with different game options. playing with different characters, learning new combos, altering the controls on your later playthroughs, taking in the sights, discovering cheats to alter gameplay in some video games.
Like for example in the True Crimes Streets Of LA game for PS2 and Gamecube, lets you enter a cheat to change your character skin by entering different names into the saved game file. You can become Snoop Dogg the real life rapper also for limited time by entering a cheat found in the game cases slide.
Duke Nukem Zero Hour for the Nintendo 64 lets you alter the sky color, and the fog and a hell of a lot with it's cheats.
If you ever get board with one game you could enter some cheats in some games to have a brand new experience just a thought.
Me personally want to get as many games as I can, while my local retro shops are still open.
A lot of video games have a big head mode like in Call Of Duty Finest Hour that is unlockable with other cheats by completing the game on different difficulty options also
have fun either way
(edit) Do research before doing some cheats in game because some of them may break or damage them like in the Sims 2 PC for example