If this were an option, it would actually easily force me into actually buying or leasing a new car, and I would be very willing to pay a 25% plus premium.
I LOVE driving. I also love my time though. If I could jump into my car, set an address, and read a book on my way there, watch a movie, or work, it would be incredible. Currently my commute is relatively short, but that hasn't always been the case. If I had a self driving car, I would also be far more likely to commute further.
On a car with good gas mileage, it would also make longer driving trips a whole lot more pleasant.
Those of you who are thinking drinking will be possible

whistle: Cheech :na

can forget about it though. Unfortunately. Even if the car is self driving, an operator will still be required to be capable of taking over in the event of problems.
We're actually quite far behind on the self driving concept, from where most futurists predicted we would be, 20-40 years ago
We, human beings I mean, experience hundreds of stimuli at any given time. If you sit back, relax, and actually take stock of yourself, you will be able to catalog all kinds of sensations.
When driving a car, realistically, only our vision is used, hearing also, but to a much, much lesser degree. Theoretically this puts us far at a disadvantage versus any number of sensors that can be implemented in a self driving car. Radar, sonar, cameras, gps, car to car communication... all of these would provide a far better picture versus the ability of a person to see from inside most cars. Blinds spots... not an issue.
In terms of reaction time, it takes about 1 second for a person to actually hit the break, after they become aware that they need to brake... at best .25 seconds. This is painfully slow versus what a computer system would be capable of.
Lastly... self driving cars have an ace up their sleeve that most of us do not...
Situational awareness. With the added perception capabilities a self driving car can be aware of other cars surrounding it, to a far greater degree... this means your car can react to a situation that you as a human operator, would not even be aware exists yet, much less requires action.