Hey guys.  

Sorry if this topic has been up in the past but it is an interesting one given the machine is now close to ten years old in both Europe and the United States.
 
 

1. Ratchet and clank 3
2. Jak 3
3. Jak 1
4. Ratchet and clank 2
5. Jak 2
6. God of War
7. Ratchet and Clank
8. Sly cooper
9. Marvel: Ultimate Alliance
10. God of War 2.
 
YEAH THAT'S RIGHT, NO SHADOW OR ICO!

I don't think I've even played then in the short time I've had my PS2. Still here's my list:
 
5. Shin Megami Tensei: Digital Devil Saga
4. Metal Gear Solid 3: Snake Eater
3. Metal Gear Solid 2: Sons of Liberty
2. Shin Megami Tensei: Nocturne
1. Shin Megame Tensei: Persona 3 FES
 
not a lot of varitety but whatever, they're all fantastic games.

Since I haven't had a PS2 for all that long, I'm just going to post the ones I think I'm going to love the most.  

1. Odin Sphere
2. Shadow of the Colossus
3. Metal Gear Solid 2/3
4. Persona 3/4
5. Sly Cooper
6. Silent hill 2/3
7. Xenosaga
8. Suikoden 5
9. Tales of Legendia
10. Dragon Quest
11. Gran Turismo

1. Rez
2. Shadow of the Colossus
3. GTA Vice City
4. GTA III
5. Ico
6. Wipeout Fusion  - I actually think it's an excellent game, if a little off-target with the rest of the Wipeout universe
7. Burnout 2
8. Katamari Damacy
9. Jak & Daxter
10. Maximo: Ghosts to Glory (yup, really)

" 1.Radiata Stories
2. Beyond Good and Evil
3. Final Fantasy X
4. Fatal Frame
5. Okami
6. Kingdom Hearts
7.Ratchet and Clank
8. Metal Gear Solid 3
9. Persona 4
10. Guitar Hero
 
@lilman1101:  also no variety. "

I can't pick a favourite, so these are in no particular order:
 
1. Persona 4
2. .hack//G.U. series
3. Shadow of the Colossus
4. Ratchet and Clank series
5. Okage
6. Tales of the Abyss
7. Ape Escape 2
8. Metal Gear Solid 2/3
9. Prince of Persia: The Two Thrones
10. Phantom Brave
 
Honourabe mentions go to Persona 3, Disgaea, Makai Kingdom, the Megaman games ( I consider myself a huge Megaman fan, but the PS2 games aren't so great), Psychonauts, and Ty the Tasmanian Tiger.

10. Grand Theft Auto III
9. ICO 
8. Final Fantasy X  
7. God of War 
6. Zone of the Enders 2 
5. Metal Gear Solid 2: Sons of Liberty
4. God of War II 
3. Prince of Persia: The Sands of Time
2. Metal Gear Solid 3: Snake Eater
1. Shadow of the Colossus 
 
Can't help it, SoC was too memorable for me. It was such a great game. :D

gawd I dunno
 
FFXII
Persona 4
Persona 3:FES
Shadow of the Colossus
SMT: Nocturne
GTA:SA
FFX-2  '

Sands of Time I guess (I played the PC version though)
 
that's literally all I can think of D: (no order)

10) Ico
9) Shadow of the Colossus
8) Persona 4
7) Kingdom Hearts
6) God of War II
5) Silent Hill 2 : Restless Dreams
4) Persona 3: FES
3) Metal Gear Solid 2 : Substance
2) Metal Gear Solid 3: Subsistence
1) Final Fantasy X

I still missed out on a lot of ps2 games, I don't game a lot so I'm still not done with some games on my top 10, but I've completed them all at least once:

10) Final Fantasy XII 
9) Shadow of the colossus
8) Devil May Cry III SE
7) Metal gear solid 3
6) Kingdom hearts
5) Xenosaga
4) Persona 4
3) Persona 3 Fes
2) God Hand
1) ICO

I admit ICO was probably a fluke, if I were to play it at a different time with different expectations, I probably would've liked it less, I didn't know what to expect so I enjoyed it quite a bit.

1 timesplitters 3 future perfect-

2 gta san andreas

3 driver paralel lines

4 rugrats royal ransom

5 driv3r

6 gta vcs

7 gta vc

8 timesplitters 2

9 timesplitters

10 nightfire