Loads of great driving roads and also some real rubbish ones as well.
In Florida, the roads around the Everglades are fun and the roads all the way down to Key West are picturesque and the Sunsets are not to be missed.
All depends on how long you are there for and where you are staying.
There are lots of areas that are a no go, so do your research and do not stray off the beaten track.
Alex.