Ultimate PS2 library!

OK, I can't afford to get EVERY game on the PS2 (my favorite gaming platform... well not counting the Vectrex), but I've been amassing a moderately impressive PS2 library for some time.

Here's what I have:
Alien Hominid
Batman: Rise of the Sin Tzu
Batman Vengeance
Beyond Good and Evil
Bully
Capcom Greatest Hits vol. 2
Chulip
Destroy all humans!
God of War
God of War 2
Guitar Hero
Grand Theft Auto 3
Grand Theft Auto Vice City
Grand Theft Auto San Andreas
Escape from Monkey Island
Fatal Frame II: Crimson Butterfly
Harry Potter Quiddith World Cup
Haunted Mansion
Ico
I-Ninja
Incredible Hulk: Ultimate Destruction
Justice League Heroes
James Bond: Everything or Nothing
Peter Jackson's King Kong
Katamari Damacy
Kya: Dark Lineage
Lego Batman
Lego Indiana Jones
Lego Star Wars
Lego Star Wars: Original Trilogy
Leisure Suit Larry Magna Cum Laude
Lord of the Rings: Two Towers
Mad Maestro!
Matrix: Path of Neo
Metal Slug Anthology
Metal Gear Solid: Sons of Liberty
Mark of Kri
Maximo: Ghosts to Glory
Maximo vs. Army of Zin
Midway Arcade Treasures vol 2
Monster House
Onimusha: Warlords
Pac-Man World 2
Pirates: Legend of Black Kat
Pitfall: The lost Expedition
Prince of Persia: The Sands of Time
Prince of Persia: The Two Thrones
Psi-Ops
Psychonauts
Ratchet and Clank
Rathet and Clank Going Commando
Ratchet and Clank Up your Arsenal
Red Dead Revolver
Resident Evil 4
Rygar: The Legendary Adventure
Shadow of the Colossus
Shadow of Rome
Silent Hill 3
Simpsons Hit and Run
Simpsons Game
Sly Cooper and the Thievius Racoonus
Sly 2: Band of Thieves
Spider-Man
SpongeBob: Atlantis Squarepantis
SpongeBob: Creature from the Krusty Krab
Star Wars: Battlefront 2
Star Wars: Force Unleashed
Star Wars E3: Revenge of the Sith
Stuntman Ignition
Swashbucklers: Blue vs Grey
Tak and the power of juju
Tak 2: Staff of dreams
Tak: the great Juju challenge
Tak and the Guardians of Gross
Tomb Raider: Legend
Trapt
Twisted Metal: Black
Wall-E
Up
War of the Monsters
The Warriors

And here's what I planning on getting:
Okami
Klonoa 2
Tony Hawk Pro Skater 3 (Hey, Metacritic says it's the #1 PS2 game!)
Viewtiful Joe
Disaster Report
Red Faction
Mystic Heroes (which was great on the Game Cube)
Jak and Daxster (which I played to completion but for some reason don't own)
Ultimate Spider-Man
Devil May Cry

So, given all of those titles (and that I really don't play sports games) are there any must play or important PS2 titles missing from my collection? Post your recommendations below!