Because nostalgia ruins my perception of a lot of these franchises, I'm simply going to do mine by how long I can roughly remember spending on the games:
1. Pokemon
2. Crash Bandicoot
3. Spyro
4. Mario
5. Tekken
6. Banjo Kazooie
7. Donkey Kong
8. Driver
9. Croc
10. Bug's Bunny: Lost in Time
11. (if Bug's Bunny doesn't count) Dino Crisis*
*The reason why this is below Bug's Bunny is because I seldom played it myself - I was too scared, but I used to love watching my dad play it.