I don't think it is fair for me to vote, becuase I don't have all the systems listed. But, I will offer my 2 cents. I think that the Nintendo 64 is one of (if not THE) greatest systems ever created. It revolutionized the industry. I , however, feel that is great for another purpose: my top 3 favorite games of all time are on there. I love Zelda: OoT, Super Smash Brothers, and Goldeneye 007. Not to mention Star Wars: Shadows of the Empire (which was also available on PC), Mario Kart 64, Super Mario 64, Banjo Kazooie, Diddy Kong Racing, and 1080 Snoboarding.
I grew up at the age where the Ninteno 64 was simply magical. I remember those halcyon days where I could come hoe from school with no homework, and spend 4 hours at a friend's house playing Shadows of the Empire or Goldeneye. When I look back, those days bring a tear to my eye.
I'm going to be off to college here very soon, and the Nintendo 64 will always be the testament, the symbol, of my childhood. It was such a simple machine, yet the stories it told and the charachters that I befriended give me such a positive view of my past.
Thanks, Nintendo 64!