Happy Birthday to my favorite game of all time, and thanks for making this thread.
This game is the reason for my screenname. Therefore, without this game I would not exist!
I first played/beat this game in a single 16 hour sitting, having rented it from my local video store. My friend and I pulled an all nighter and completed the game probably at around 65%. Needless to say I was blown away. Metroid on the NES had been my favorite game up until that point and this sequel did not disappoint.
Several years later in college my household (two guys/two girls) rediscovered the title and went about searching for all the items. This was before the internet, or just as the internet was taking off and we were determined to find everything without help from strategy guides or phone calls to Nintendo's help line. Of course we were able to find everything and celebrated this victory by trying to get the lowest time.
My person records are 1:31 100% ending and 1:11 any % ending.
I'm still waiting for a remake or re-imagining of this title, although I'd probably prefer a brand new game with the same graphical design.
Happy Birthday, Super Metroid. May the etecoons forever frustrate the novice initiate, teach the apprentice, and guide the masters to more sequence breaks than we'll ever know!