We remember it because...
Final Fantasy VII is considered by many to be one of the best RPGs ever created, and as a result it has amassed a dedicated following. This initial encounter was the player's first real introduction to the extremely popular protagonist, and not only did it reveal the game's combat mechanics, but it gave us a preliminary insight into the nature of one of Final Fantasy's most beloved characters.
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Why not just make a list of 'my favourite games' if enemies can get put on the list solely because they're from a favourite game of yours, rather than because they're particularly memorable enemies.
I started God of War for the first time two weeks ago. Had you asked me this morning, I couldn't have told you what were the first enemies in the game.19-God of War: Legionnaire