
The thing that ruined Diddy Kong Racing for me was that you couldn't really beat it unless you collected everything. I finally got to Wiz Pig and beat him, which was really hard, and then afterwards he just showed back up and chased us all away because I hadn't collected all the doodads. Left a sour taste in my mouth. Technically, though, it's a very solid racer.
I still quote Clayfighter 63 1/3 too. Tons of great one liners