In honesty? Sega.

I just got a DC because I realized how many awesome games are on it. I also need a new Saturn and a new Mega Drive, but I already have the games.

I would honestly have to put Microsoft second, too. I know it's totally uncools to <3 Gates, but the X-Box was better for me than the PS2 was, excepting that the PS2 could play all the awesome RPGs from the PS1 era.

And then Sony in third. Or first, on your poll. They easily beat Nintendo IMO, though I have to give huge credit to the N64 they've never done anything else I care much about. I don't own a single GC game.