If you buy a Ps2 and don't get GTA3, you don't deserve it. I'll personally get somebody round to steal it off you.........GTA3 style
Actually it's coming out on PC soon, so maybe you can get that version. Whichever you prefer.
Get FFX, MGS2.
SH2 if you like freaky games. Tekken 4/VF4 if you like fighting games.
Don't get DMC or Onimusha, I think they are lame. Poor voice acting, typical "Capcom" bodged gameplay (the enemies are always the same, and it gets WAY repetitive). Just feels like there's no substance in their adventure type games. That's MO newayz, so see what you think before hand. You might like them
Ps2 is one of my favourite consoles. It has everything you could want from a console.