I find both kinds of gearboxes useful. The automatic is for driving the cars that are like kitchen appliances, that I don't care much about (e.g. the Honda Accord). Also more for city driving, chores, etc when I can't be bothered to pay much attention to my driving. The manual is for my driving car, the one I enjoy trips on (the VW Passat TDI) - more for the country.
One other factor. Cars have gotten so disconnected from our inputs - everything has a computer between me and the wheels, brakes, etc. I don't really like that much; cars were more interesting, more visceral (if not more efficient) when the only electronic thing in them was the radio. Shifting manually is a way to get a little of that feeling back.
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