Yeah, I think it's fairly normal to have an officer outside of or at the entrance to a polling location. They're not actually in the room with poll watchers, etc., and certainly nowhere near the private voting booths.
It has never felt inappropriate to me – maybe because I typically vote at a public school, where it's normal to see a crossing guard or public safety officer outside.
I buy a lot of fresh produce, which is way faster with a good cashier who knows all of the codes. I also tend to buy multiples of an item, which is also way faster when the cashier can swipe one and then hit 6x or whatevs.
And that's assuming the self-checkout system is working perfectly, which is rare. They often have some janky anti-theft sensors that freak out if you remove a bag or item from the bagging area. Self-checkout is fine or maybe even better if you have a few items, but for a cart full of groceries, it is inarguably way slower than a decent human cashier.
Very easy to switch, in my experience. It is like muscle memory. It might take a few weeks to get comfortable with manual, but once you do, it doesn't require much thought to switch gears.
It's a sequence that just happens, similar to typing. You still need to think about what you're saying, etc., but you don't have to consciously think, "now I'm typing an S."
I drive automatic now, but I miss stick sometimes. One of our family cars was a manual when I was a teen, 20 years ago.
I feel driving manual encourages a deeper focus on the road ahead and deeper connection with how your vehicle operates. You tend to plan ahead a bit more, be more aware of hills and curves, cars slowing down ahead, etc. – anything that'll make you need to switch gears. You could still have distracted driving, especially on highways, but driving stick lessens it, I think, though I have zero evidence to support that feeling.