The Dreamcast...

[Madame Adequate]

The Dreamcast was god damned AWESOME. For me, it really ushered in the "next gen", far more than the PS1 or Saturn did (And I got one before the PS2 or X-Box, so... yeah. xD)

Classic games on there. Honestly, neither 2 or 3 beat the original Soul Calibur for sheer, inspired brilliance. Jet Set Radio - a game that tries to be hip and fresh, only to redefine those terms. Shenmue I & II; what can you really say? They aren't perfect, and the series needs completion, but my God, those games are something else entirely. And Skies of Arcadia. One of the single best RPGs ever made, a work of masterful quality from top to bottom. I even like the main character.

Crazy Taxi, too. Man, I loved that game...

Grandia II, more classic RPG fare.

Omikron, whilst terribly flawed, was still an incredible and ambitious game that I played to death.

Oh, and I need to get a hold of Toy Commander. I remember playing the demo tons, never got the full game though...