I think flying cars are a horrible idea and way worse without strict regulations. People are bad enough at driving in 2 dimensions. Self-driving is no solution, if you look at all the crashes they've gotten into. With 3 dimensions and obstacles like power lines, buildings, towers, etc., not to mention weather, self-driving would become be even harder. Any crashes would become far more lethal and probably involve more innocent bystanders.
Not to mention the noise... like 100x as loud as toy drones. Then, the privacy invasions and trespassing arguments, with people flying their cars all over the place and getting shot at by angry property owners on the ground.
Think, for a moment, what air planes & airports would be like, without the FAA. I probably would never use airplanes as a mode of transportation, in such a world.