I have all the current as well as retro systems and would have to say PS1 & Saturn. The vast majority of the games for both these systems tried to push 3D too far too soon. Most of the games are just too painful to play (horrible framerates/blocky textures etc.). Don't get me wrong, there are many games on both systems that I still love, it's just there are a lot of games that show that the systems weren't ready to push the 3D at the time. I believe that the other systems on the list have held up very well as they do a good job what what they were meant to. While the N64 does suffer from some of the same problems that the PS1/Saturn do, it has far more games that are still enjoyable today.
I didn't vote as the PS1 & Saturn are pretty much tied for me.
I would say for 2D systems, the greatness started with the NES and just got better. For 3D, it really started with the Dreamcast.
Stop hating and start playing.
