Beyblade ^^

Final Fantasy 7, 8 and 9, Chrono Cross, Xenogears

Pandemonium, Heart of Darkness and Rayman, just do it :D

No One Lives Forever 1 and 2 (DRM-free)

Harry Potter 1 & 2,Crunch,Tomb Raider 1-5,Crash Team Racing,Tekken 3

1st tomb raider , 1st silent hill :D

Maybe you played the Bugs Bunny games (Lost in Time, and Time Busters [this one is a coop with Taz!])
Other Disney games
And my personal favorite: Valkyrie Profile

Legend Of Dragoon

Echo Night
Vagrant Story

• Tales of Destiny;
• Rival Schools;
• Street Fighter EX 2;
• Skull Monkeys;
• One;
• Vandal Hearts series;
• Alien Trilogy;
• Dead or Alive.

Alundra was a really cool game too

MGS
Medievil

Didn't see this one mentioned yet, what about Croc: Legend of the Gobbos?

Tom and Jerry (In House Trap) on PS1 was really good.

Anyway, Mortal Kombat 3

Vandal Hearts!

Legend of Dragoon. Way over 100 hours to finish that bad boy.

Overboard! (Shipwreckers!) was a very nice game too! Still not boring at all! :)

Tenchu

tldr; Dino Crisis 2

Front Mission 3
Capcom vs SNK
Winning Eleven 6

I don't know if anyone has mentioned Onimusha, but that was an awesome game xD

LSD Dream Emulator

some games i have in ps1 emulator that are worth playing:

• Chrono Trigger
• Chrono Cross
• Final Fantasy Tactics,7,8,9
• Legend of Dragoon
• Medievil 1,2
• Tombi 1,2
• Breath of Fire 4
• Vagrant Story
• Klonoa
• Driver 1,2

Tomba

Your list is awesome and i really love on PSX these games
Syphon Filter series (2+3 was perfect!)
Army Men series
Blade (Marvel)
Bugs Bunny Games
Castlevania - Symphony of the Night
Cool Boarders 4
Spec Ops Series (the isometric game was awesome!!!!!!!!)
Toy Story 2
Destrega (funny 3D beat'em up)
Driver 2 :)))))))))))))))))))))))))))))))))))
Duke Nukem - Time to Kill / Land of Babes. (Time to kill was so fucking awesome!)
Evil Dead - Hail to the King (crappy controls but funny ^^)
Fighting Force 2 (the first part wars better and with great 2P Mode :))) - but for PC too)
Firebugs
Harry Potter series (other version than PC/PS2 and Xbox but still awesooooooooooooooome)
Jackie Chan Stuntmaster (to short but awesome!)
Lilo & Stitch (i think a good 3D jump & run game)
Medal of Honor + Underground
Medi Evil 1+2 awesoooooooooome :D
Metal Gear Solid
Mickey's Wild Adventure
Point Blank series (fun light gun shooter)
Road Rash
Silent Bomber (HIDDEN GEM :)))))))))))))
SpongeBob SquarePants - SuperSponge xD
Tenchu: Stealth Assassins
The Mummy
Tom Clancy's Rainbow Six - Lone Wolf (first RS and Rogue Spear was on PC awesome!!!!!!!!!!)
Twisted Metal series (like Vigilante)
Ultimate Fighting Championship (awesome graphic and good MMA game)
VIP (TRAAAAAASH with Pamela Anderson, but funny today^^)
WWF SmackDown! 2 - Know Your Role (one of the best!!!!!!! part 1 was good, but 2 was better!)
Fire Pro Wrestling G (The best Fire Pro and one of THE best wrestling games, was Fire Pro Returns for PS2 but this was a good first mover)

And many more but the most of them was for PC too, like the great Disney Interactive games (Hercules, Emperor's New Groove, Aladdin, 102 Dalmatiners, Donald goin Quackers!!! and more) or Flintstones, The - Bedrock Bowling, Destruction Derby, Tony Hawk Series ____
Future Cop - L.A.P.D. :)))))))))))) M&M Shell Shocked (PC version was so good^^) MTV Celebrity Deathmatch, NFS II SE with the best car skins cheats EVER! :D Dino Crisis, Resi, Rayman 1+2, Spider-Man,