[VFR Rider]

If you are relying on the GPS and it's route calculation to find you the small, twisty roads that are fun to ride it isn't going to happen. Most of the automatic route calculation is based on the fastest most direct routes (i.e. interstates and major highways.)

If you want to use the gps, then it is best to have a mapping software (i.e. Mapsource, etc.) to plan the route and then upload it to your GPS. The other trick I have learned is to add enough waypoints so if you get rerouted, diverted, etc. that you don't end up with the endless u-turn nonsense.