Classic games, very nice, but I suck at playing them, exactly as Moto writes - before I even figure out what to do I'm already dead.
AB3D though is absolutely awesome, despite the grainy graphics I think it's still the best Amiga FPS by far. TKG I haven't played much, because it crawls even on 060.
Did you ever try the TKGTurbo patch on 060? Made a noticeable difference on my 040.