So number is in!
Decided not to go for anything rare or expensive but special in a way that fits my way of collecting these. Everybody's Golf is by far the game i've played most on PSP. I still till this day play the PSP version once in a while on my PSVita, especially on holidays. It's the ultimate casual game I can pick up and put away anytime.
Seeing how mainstream this game was it was oddly hard to obtain in a english variant. Like with a lot of sealed PAL PSP games the Italian box art version is common but the English box art versions are harder to find. All my games have either English or Dutch box art.