Jak and Daxter, the whole trilogy.
The first one is more of a classic platformer, but Jak 2 and 3 were like fantasy Grand Theft Auto.
And Ratchet & Clank trilogy
The one I played the most was burnout 3.
Though I think the one I replayed the most was ace combat 4
Honorable mention to James bond eon
Katamari Damacy. It's the only PS2 game I own. Bought it to play on my son's PS2.
I love Katamari Damacy as well! I think it was the most fun game I played!
Shadow of the Colossus was the first game that gave me feels that I couldn't articulate. It re-framed my idea of what a game could be, and gently pushed me to think about games as a medium.
SotC definetly one of my favorites as well.
I was too young to play it when it came out, but watching my dad play it was the most mind blowing things to me as a kid. I was completely immersed in it then, and its still my favorite game of all time.
Dragon Ball Z Budokai Tenkaichi 3, this game is perfect as a Dragon Ball Z simulator, even for today's standards, I wanted to mention an exclusive title, but many of the PS2 games have already been ported to other platforms, which speaks very well about the PS2 itself.
I had ton of fun playing this one with friends!
I am currently playing the DBZ Budokai Tenkaichi 4 fan game (based on BDT3) with no friends sadly, but having a blast regardless.
Armored Core 3 probably.
Metal Gear Solid 3: Subsistence. It fixed the camera issues with 3 which was already a great game. For me 3: S was the peak MGS.
I'm a pretty big fan of Jak 3, personally
I want more games exactly like that. They're hard to come by.
I spent hours enjoying Def Jam Fight for New York. My friends and I played the hell out of that game
