Best PS2 Games

[Galangal]

The best game I played on PS2 is probably Metal Gear Solid 3: Snake Eater.
Great story, great gameplay, great graphics.
If you're into Cold War espionage with an extra twist, buy it. (Having played previous Metal Gear Solid games is recommended though)

Ofcourse there are the Grand Theft Autos too and especially Canes Canem Edit by the same developers.
It's a bit the same style as Grand Theft Auto, but without the violence, carjacking and drugs dealing. Basically you're a kid in a boarding school that has to stand up for himself. The game had some negative critics because it encouraged bullying or whatever... don't let that part scare you. It's a brilliant game.

-MGS, GTA and CCE have a brilliant singleplayer (actually don't have a multi) and you'll enjoy it for a long time.

-I've played MGS 3 or 4 times, just because the story and such was awesomeness. Ended GTA Vice City twice and San Andreas three times.
Replay value? You bet.

-Sports? Well, you can fight in all those games I mentioned... euhm

-There are racing contests in GTA series and a bicycle race in Canes Canem Edit.

Phew, there you go. I might have more memorable games on the PS2, but those are the ones I really remember. (Oh, Socom series are fun too)