What about the games?

So I mentioned the Sony PSP was an excellent gaming console but what about the games?
I have five games, three of which I play more than the others.
Need for Speed Underground Rivals is one game I didn't expect to like that much. Instead, Need for Speed is the game I play the most - probably because I have managed to win a lot of the races.
Ridge Racer, on the other, hand has beautiful graphics for the racing locations and tracks, but I have yet to win a race - starting in 12th position is a big difference from starting in fourth position in a three lap race.
Then there is Grand Theft Auto: Liberty City Stories. This is one of the most popular PSP games to date. The game content is rather amoral but the game opens an intriguing universe to explore. It is a relatively difficult game - or at least I find some of the missions rather challenging - having to try several times, and getting "Wasted" each time before completing a mission. At least you are not totally stuck, as you can go off and take part in side missions or just explore the dangerous city. My character was exploring the dock area, looking for hidden packages (collect enough hidden packages and you get additional items available to you, from guns to motorcycles). There happens to be a strike on there and some of the strikers took exception to his presence and wasted him. Next time he went down there with a baseball bat and turned the tables on the attackers...

The other two games are Namco Museum Battle Collection & Wipeout Pure.
The Museum Battle Collection is a bunch of arcade games which just don't grab me.
Wipeout Pure is a Sci-Fi racing game, but I just haven't been able to get into it.