This was one of my first gameboy games.
I never thought I'd say this about a Metroid game, but I got some strong nostalgic attachments for this game...
I forget sometimes that I played this before I played Smash Bros. Before I played Smash Bros, I was pretty closed minded. I wouldn't play anything if Mario or Pokemon weren't connected to it in some way. I actually forgot who Samus after playing Metroid II, so I didn't understand why she looked so familiar.
This game kept me pretty busy as a kid. I have no idea why it intrigued me so much, when, as I said, I was so picky about my games. But I eventually exterminated all metroids, without being aware that that was the goal of the whole game. Met the Metroid Queen, but never was able to beat her.
I would love to have another chance to do so.