If it doesn't exist, tell us what it should be like. If there already is a cyberpunk game you like, tell us why it works for you. I've probably talked about this stuff before, but screw it, I still want to yak about my favorite flavor of sci-fi.
It seems there are roughly two types of cyberpunk games on the market: one type is about tactical cyber-dungeons (the trad games), the other type about noirish character relationships (Remember Tomorrow, Technoir). The tactical type appeals to me in its first-person immersionism and slow tempo: you are actually there in the graffiti-covered tube station, holding that smartlinked MGX laser-spammer in your chromed hand. But then we'll get to the boring stuff: where are you actually standing, by the trashcan or next to the rails? Is your smartlink +1 or +2? What is your rate of fire?
The noirish type, especially Remember Tomorrow, appeals to me in its lightness and freedom, but is more about who's screwing who than sights and sounds, time and place.