This is my favorite Smash Bros. game, but because it was competitive. It introduced some awesome levels and the music was amazing for the most part, and it introduced some more fighters, one of which became my permanent main (peach). I remember always doing the Event Match levels, they were my favorite thing to do in the game, unlocking things and doing usual match ups were my thing back in the day.
The other big memory is that my friends would always come over and play this with me, always going to Hyrule Temple and going to the underside and just whack each other until we were bouncing off every wall of the stage.
It was a memorable experience, and it's why I think Smash is a great game, despite me not really playing much of it anymore.
The competitive part is interesting, but I also think it kinda ruins the chaotic part of the game that I enjoy so I don't think its necessary in this or in any game. (FInal Destination is so boring I don't get it! lol)