My favorite Amiga game? Too hard to call, but here are some of my favorties, in no particular order...
Superfrog, Pirates, Turrican, Battle Squadron, Worms, Settlers, Civilization, Walker, Gloom, Zany Golf, PGA Tour Golf, Zoom!, Battle Chess, Lemmings, Banshee, Lotus 3, Chaos Engine, Roadkill, Super Stardust, Speedball 2, Populous, Archon, Archon II, Alien Breed, Tetris, Hybris, Blood Money, Pinball Dreams, Pinball Fantasies, Pinball Illusions, Arkanoid, Soccer Kid, Shadow of the Beast...
I know there's more, but wow! that's a bunch! How many PC games could I list? Probably only a few...