I have Spyro: Year of the Dragon. It was my first PS1 game I had.
I still have it and when I feel like just playing something fun but don't need to worry about the storyline and such, I just pop it in.
Getting treasure gems were nice; using a simple fire attack on enemies 5 times your size to destroy them was fun; gliding through the air was a nice perk too
And ramming helpless animals to increase your little Dragonfly was fun too; poor sheep had no clue, hehehehe...
And the baby dragons that miraculously hatched as soon as you find them were so cute >__<