There's the Spyro series. The first Jak and Daxter is great and even though the Crash Bandicoot series has faltered, Crash Twinsanity is fun, challenging and has a great sense of humour.

A good 2 player game is Hot Shots Golf 3 (and probably 4). The Hot Shots series is fun even if you don't like sport games. It doesn't take itself too seriously. As for racing games, you can check out the Need for Speed series. There always pretty solid.