Crazy Taxi is deffinately fun to play.. but gets quite repetative after a while.. I'd recommend renting it though for sure.. Crazy Taxi 2 is more of the same as well..
Driver is a pretty sweet series, I find myself still going back to even Driver 1 and playing the odd time.
and Grand Theft Auto? just wait for the next one to come out.. it's supposed to look pretty much like the Driver series, and you do basically the same things you do in GTA (steal cars, run over people, evade cops, do jobs for mob, and so on)
Grand Theft Auto 1 and 2 are all top-view (quite far above the city), so the graphics aren't really that great.. although the explosions are nice..
If you're into games like Grand Theft Auto, look into the Carmageddon series...