I prefer driving, but am ok with being a passenger in the right car with a driver I personally know (i.e. my driver, vs. even a random guy from the motor pool, and certainly not UberX or a black car/taxi driver). For me I'd pay $50/hr to drive on a great road, $20 for most roads on e.g. the Peninsula, $0 for stop-and-go or SF anytime, -$20 to have a meh driver drive me around (black car or great uberx) or a very luxurious or empty train; $0-20 for a great driver I know and trust, -$50 for most taxis or a slightly crowded train, and -$100 for Thai taxis or public transit on wheels.