Easy there scooter...
I have/had every single console since the NES (including the Jaguar and 3DO, CDi, and Neo Geo among others, most of which I still own), and as I said at first, when it works and doesn't break, which I'll fully admit it does often, the 360 is the best console ever. What it brought with Xbox Live and all the things that does making it the best online system around, the only thing it lacks is a huge number of exclusives, but the ones it does have are great.
If you want to talk purely a leap in technology over the prior gen then it has to be the PS1 or 360/PS3...that's not even debatable.
Shrug, maybe you guys think so fondly of these systems of the past because you haven't played them lately, whereas I still have most of them hooked up in my game room and play them on occasion. If I was going to vote for an older system it would be SNES, as I still have fun with that playing Super Punch-Out!!...lol.