Its short, but fun.
Blue River Road is on the southeast side of Kansas City, and by an amazing coincidence runs alongside the little Blue River. Its very twisty, and a lot of fun to drive on the way home from work.
Drawbacks: traffic - I've been caught behind people who insist on doing the speed limit ( I think its 45), and bicycle riders use it too, during the summer. Deer like to wander across the road too, usually at the most inconvenient places.
Plusses: I have never, ever seen the police doing speed checks on this road, and when you aren't straightening the curves the scenery is nice too.