After owning my (first) A500 for a few years and collecting a lot of boxed originals early on, I noticed many games that I would play for a week or two, while they were new, then never spend more than 5-10 minute stints on them again.
But, there were a -small- number of Amiga titles I'd play even when I didnt really feel like gaming on my A500;
-Rodland
-Buggy Boy
-Bubble Bobble
?
Quick, simple pick-up-and-play arcade style games.