The original arcade and Dreamcast Crazy Taxi had a very aggressive aesthetic. The announcer invited you to make "crazy money" by picking up customers and then delivering them as quickly as possible to their destinations, and you never had to worry about traffic laws or bystanders. This was all about speed and brute force.
It was hard to play the Xbox Live Arcade version without hearing the Offspring's familiar "Yeah yeah yeah yeah!" blasting out of the speakers. The Offspring, along with Bad Religion, provided the game's soundtrack in the original release. These songs, along with the sound of that announcer, went a long way toward creating the game's mood. In the new version, they have been replaced by completely forgettable pop-punk tracks, and it's a downgrade.