As far as my favorite, its gotta be xbox 360. I've gamed more on that console in the time I've had it than any other. Second is n64 because there were so many unique but still fun games in that era.
As far as the best console I've had - Dreamcast. Best ratio of good games to games made by far.
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)