It does force you to use touch screen all the time. It even makes the distinguished mentally-challenged mistake of having touch screen shit happening in real time while other things are.
For example: you are running from the cops, you see a car you want to jack, you go in and suddenly you have to play a fucking mini-game, which you can't even complete because it's fucking real time and the cop will throw you out. Or how about having to rub the bottom screen to bring a patient back to life while driving the ambulance. Or having to touch the screen to throw grenades. Or having to use the touch screen for basic menu commands. Or having to press a fake button on the touch screen WHEN THERE ARE 8 PHYSICAL BUTTONS TO USE, ONE OF WHICH IS USED TO ACTIVATE THINGS.
The worst is that a lot of these require the stylus and can't be done with a finger tap.
PSP can play 6 GTA games; only one of those games is worse than Chinatown Wars.
I could never really get into the GTA sidestory games on the PSP. If I want to play a GTA3-style GTA game, I'll just pop one of those in my PS2. The PSP GTA's just felt like too much of a retread and not really designed to be portable games. And I'm a huge GTA fan, played the series from the first game up to Chinatown and beaten most of them.
On the other hand, Chinatown Wars is an awesome fusion of some of the things that made the old GTAs so good and some of the things that made the newer GTAs so good, while being perfectly suited to short bursts of 10-15 minutes and actually making decent use of the DS's touch screen.
But I really don't it did that. Chinatown Wars is a 3D GTA game set in the overhead position. The mission formula, the combat and controls and practically everything else are from the 3D GTA games. As someone who only really hated GTA Advance out of all the GTA games, I still think that Chinatown Wars is one of the lesser games with regular GTA4 (Lost and the Damned is awesome).
As for the PSP "stories" games, yeah, they weren't suited for portable gaming, but that doesn't mean shit, especially if you played them on the PS2. The only thing they really had less than the original counter parts were less compelling stories, but Chinatown Wars doesn't have a good story or even cutscenes with serviceable dialogue. And Phil Collins was in Vice City Stories. Phil Collins > distinguished mentally-challenged looking Will Smith look-a-like with lame jokes about honor