Some interesting (and predictable
) replies to the OP's question here but I do disagree with many of them. If you want to impress someone new to the Amiga you'd ideally want to show them (not necessarily in order):
1) something they haven't seen before (i.e. unique to the Amiga)
2) something with great graphics and sound
3) something that plays
really well
Sadly that cuts a *lot* from the Amiga library - too many bad ST ports, too many games with nice graphics/sound but terrible gameplay (I'd never give someone Beast or Brian the Lion to
play) and annoyingly, many great games with
horrible graphics.
Everyone has their favourites of course (including me) but to look at the Amiga from an outsider's perspective you have to first remove the rose-tinted glasses