I agree with Joe. I prefer Sonic & Sega All-Stars Racing to Mario Kart. The only Mario Karts I've ever liked were the SNES original and Super Circuit, since those were entertaining and had speed. His comment on Sonic R's music, though... for me it's the other way around: it rules with the vocals on.
I also agree with Dave's comment on Super Mario World being the best game in the series, but I disagree with Super Mario 64. I like my Marios in 2D, thank you very much.