Recommend me some good PS1 games

Downloaded the emulator a while back.

So far played

- FF7
- FF9
- Mortal Kombat trilogy (smashed using Noob Saibot, Baraka, Cyborg smoke)
- Driver and Driver 2
- Gran Turismo 1 and 2

I read some recommendations on other sites.
I tried the game "Castlevania" but, it absolutely stunk.

The Driver games were brilliant. Loved the theme music too.
Favorites were obviously the Final Fantasy games - so damn good. The worst part about them is when they end.

I also tried "Abes Odessy" - which I also hated.

Hit me with some other recommendations.
Does anything else on PS1 live up to the FF games?