I loved the Crash Bandicoot and Spyro series', but ultimately the best game ever was Harvest Moon: Back To Nature. The hours - no, days - I wasted on that game are dumbfounding. It's just so unbelievably addictive.
First place for me would have to be Oddworld: Abe's Oddessy. Fantastic game. Second goes to Crash Team Racing, and third to Dino Crisis 2. All three of which I still own, just can't bring myself to throw em away.