I had only one (pinball magic) for about a decade. Had a pool table and dart board in the game room as well and was pretty happy with my set up. Then I built a virtual pinball cabinet and started to get the itch to play those games in real life. Added twilight zone, the cyclone, Batman the dark knight, champion pub, revenge from mars, Star Wars ep 1, scared stiff, high deal, Metallica and rob zombie and now I seem to perpetually have one more than the amount of space I have. But I like this set up more than when I had a solo machine.