I play my Italian copy (aka the only European copy available, though it's all in English still, so it's okay...) on my PS2, but I go through phases. I play it solidly for a couple of weeks, then don't play it for a month or two, then play it for several weeks again.
Still own my original copy and am still playing it on the PS3 I first played it on. I have my first original save on it too that I used from 2008-2011. I am using newer saves now most of the time though.
I have two copies. One is so played out the disc started falling apart, so I bought a second copy. Then I got a computer that could handle the emulator and I never looked back. My PS2 is dead, and honestly this is the only game I still played on it, so I have no intentions of replacing it. I can play on the emulator and MLB 2K12 on my Xbox 360 at the same time.