Also, you say that you drive sixty cars in a year. That's what, ~50 hours per car? For better or worse, manuals aren't the kind of cars you can just pick up and drive naturally.
50 hours?! If I never slept, perhaps
How long I spend in a car depends. Several may be for as little as 30 minutes. Others are for a week. It'll be more than 60 cars by the end of this year - it's 60-ish so far.
And really, I'd say that it's quite easy to get into any vehicle and drive it naturally, provided it's been made in the last 20 years. Any older than that and cars tend to have a lot more "quirks". Heavy clutches, imprecise gearboxes, brakes that don't brake etc.
The action of using a manual with a clutch doesn't bother me, regardless of the car. But crawling in walking-pace traffic, being on and off the clutch all the time, is a ball-ache even in a car with a light clutch. The last car I drove through London in the aforementioned 2 hours/7 miles scenario was a Kia Picanto. But the clutch still requires more technique to make smooth progess. An auto just needs light pressure on either the gas or brake - and in very low speed traffic, just on and off the brake really.
I'm not saying you're wrong - if you don't mind a left leg workout for hours at a time, that's your prerogative. I'm just saying that if I regularly had to sit in traffic, it'd be an auto every time.
But then as I've said before in this thread, I prefer the idea of having a toy in the garage and a lazy, relaxing daily than having a car that has to try and handle disparate pursuits equally well. Manual for weekends, auto during the week.