Parents will find nothing objectionable about Ridge Racer 6—except that maybe the fact that cars take no damage is unrealistic and could convince little Timmy that battering his way through traffic later in life is a viable approach to the morning commute.
Casual Gamers seem to be the title's target audience. The arcade-styled racing is simple and easy to pick up and play (and doesn't require a ton of effort to master). The game features a lot of cars and tracks to unlock, but the challenge is often low enough that pretty much anyone can complete the various objectives with a few tries. Veterans of games like Gran Turismo will undoubtedly be disappointed by the lack of challenge (and realism) in this title.
Hardcore gamers will probably find that Project Gotham Racing 3 or Need for Speed: Most Wanted do more to fulfill their racing game needs. Ridge Racer 6 just doesn't sport enough depth to keep serious racing enthusiasts at the joystick for hours on end.
Deaf and Hard of Hearing gamers should note that the game has no real subtitle system, but that's not much of an issue since this is a racing game.