I've had a PS3 since launch and haven't platnumed anything. I've gotten close with a few games, but can't be bothered imo.
Too be honest with you, I probably wont either, but with Rayman it's like it's off in the distance, dangling the prize just out of reach. I HATE that with severe OCD. I have "platnumed" 3 games on the 360, so it's possible, I just don't know if I will.
So I played Persona 4 last night for a bit (up to 2.5 hours in the game now), I don't care if I haven't really played all that much, I can already tell that this game is going to be BAs.