My favorite might have been the original Xbox controller. It wasn't the most ergonomic but it just felt like something different, you know that feeling when you first try a next-gen console? That controller made me feel like it wasn't just another console...

... BUT SOMETHING MORE!

I also liked the Dreamcast a lot too, for the reasons that other person said. Memory cards were awesome.

Least favorite is PSP, followed by PSX.

If every system ever made was combined like Captain Planet into one intense, super saiyan, automobile-sized console, it still wouldn't compare to that one demo of the unnamed FPS game on Infinium Labs' Phantom from E3 of like 1999. To this day I make flipbooks of that game and pretend I'm playing it.

Just my opinion (but who could disagree?)!

On NES it's gotta be Bubble Bobble for me, if that counts.

On SNES, SUPER METROID!