PS3 really was when 3D games had matured. PS2 definitely had some blocky graphics, but still had an amazing library. It was the first system to really offer backwards compatibility and CD/DVD player.
The PS2 is still one of my favorite systems. The SNES, PS2, PS3, and PC have gotten more game play time than the other systems I have owned. On a side note, my PS3 runs cooler since it is a slim 160 GB model. I did eventually upgrade to a 240 GB SSD though!