I remember the xbox always having a full screen blur over everything, not nice on my HD ready CRT TV back then. The ps2 and gc were full of jaggies, but that wasn't that big of a problem on a CRT tube.
Whatever the technical specs, what stands out most from last gen to me are Ico, Windwaker, SotC and Okami.
Favorite racers were GT4, PGR, Burnout, Colin McRae and Rallisport challenge. Only the first one got a worthy sequel this gen although it is still missing the best tracks of gt4 :(
Best technical graphics I wouldn't know, I played on the pc to be wowed by that. Fable had some nice bits though.