The next time your date offers to drive you somewhere, pay attention to how they react on the road. “Driving is very, very revealing,” says body language expert Patti Wood (pattiwood.net). “Years ago, I was on a first date with a man who’d turn left at yellow lights, and take lots of risks on the road. That told me he was a person who would always live a little on the edge.” Other insights from Wood: Lane-changers will probably always be on the lookout for someone better-looking, smarter, or richer than you. Picky parkers who always want to go around one more time to see if they can snag a closer spot probably have problems with commitment. Herky-jerky drivers who accelerate and brake so quickly they leave your stomach queasy may have poor sense of pacing in all areas of life. Plus, if you’re driving, see how they handle it—nagging that you should slow down, speed up, or otherwise do things differently is a sign this person probably won’t love you just the way you are (starting with your bad driving).

I don't really have time for this, but this paragraph from an MSN article called "Five ways to Decode your Date" made me laugh.
http://msn.match.com/msn/article.aspx?articleid=6695&TrackingID=523934&BannerID=566942&menuid=6&GT1=9278