To me, the epitome of Amiga games were the pioneers: shooters like Hybris/Silkworm/Project X, platform shooters like Turrican/Alien Breed/Chaos Engine, strategy like Mega-lo-Mania/Populous 2, puzzles like Lemmings, sports like SWOS/Speedball 2, RPGs like Dungeon Master and pinball like Dreams/Fantasies. There are so many, it's hard to include all or indeed, pick a single title.
Actually I don't think there are that many AMiGA games which I still find as intriguing as they were once. Just like music produced during a particular period with a particular sound games tend to become dated aswell. I have one, rather not so hard to understand, prciniple of looking at games being dated or not...
Take the Playstation for example and Final Fantasy VII. FFVII is a game I really find dated since it is slow as hell, doesn't use the hardware in the machine as it could because they still didn't know how to do it... so, no matter how good the game is in theory, in practice it seems rather dated. FFXI doesn't, much because they then knew how to use the hardware and most of the graphical glitches found in FFVII were remowed, the game ran much faster and everything was way much more polished.
Talking AMiGA once again, I could mention that games I still think feels fresh are for example Turrican II, Super Stardust AGA, Super Frog, Lemmings II, Brian The Lion AGA, Slam Tilt AGA... they really used the machine's hardware to present solid titles whic ran smooth as silk. On the other hand we have titles like Speedball II, Chaos Engine, Banshee, Project X... which I on one hand consider being great games, but on the other hand think they are really lazy coded. Why on earth don't they run smooth? Speedball 2 got really jerky scrolling, Chaos Engine runs in some kind of, although smooth, 15-30 FPS scrolling which makes it seem quite blurish when running around... same goes for the monsters in Project X and the sideway scrolling in Banshee... I can't understand why on earth someone codes a game not to run as smooth as possible, like Super Frog, for example... it not like any of the latter titles mentioned are too "advanced" to run as smooth. I think many titles have lost their glory because of this... they have become dated.
And just one little question before I eat my breakfast... how on earth could Xenon II become so cherised in the press? I would give it like 1 out of 5 if I were to rate it. Repetative, not so impressive graphics, a lousy soundtrack by Bomb The Bass which one gets bored with after some 2 minutes or so, extremely jerky scrolling and sluggish control. Have I missed something here?