Ummm... I think a few of the old Amiga games stand out really well. First Samurai, Second Samurai? That's a pretty, classy scrolling beat 'em up, but it's only got so much depth.
I think the games with random starts have a bigger longevity. They offer more variety, but you got to like simulators more than games. Games like Civilization, simulators like Microprose. The daylight scenes are disappointing, but views like night vision can be quite "realistic", in terms of a military targetting system.
Then you master them, and move on.
The really good computer games are ones you play against other people. Speedball2. That's still fun. Limited, but unpredictable with a human opponent.
Any of you ever play Air Warrior? It wasn't bad on an accelerated Amiga, but it was horrible on a 7Mhz Amiga. Very clunky. Kesmai online flight sim, was OK on Amiga, but just way better on a PC. It was a subscription game anyway. They did buy the rights to do the same with Harpoon, but I don't think they released that. Harpoon started as a paper rules modern naval and air battle wargame. There were some Amiga releases, but single player only.
Apparently you can still play the DOS version of Air Warrior by browser. I really can't go there on this bag of bolts.
I think the problem was that the Amiga didn't get the nice cheap PCI and AGP hardware, didn't get the cheap network connectivity. CBM certainly developed some PCI connectivity, but didn't pay to market it, never brought it to market. They kind of got stuck between "home" machine, "game" machine, and ridicuolously priced and under spec "high end" machine. The PC "game" machines got the nice hardware, beat all kinds of Amiga for price vs performance, and that's the way things turned out.