It's been a long time since I've been at an air show. They are fun.
However, I note you didn't really answer my question.
Do you think you've seen non-manmade craft, or not?
Do you think you've seen UFO/ANTI-GRAV sorts of craft made by us, or not?
I have only seen one single anomalous thing which may qualify as a UFO.
When I was very young, maybe 12 or so, I was camping out in the summer time. I laid back on the ground and stared at the stars, and they were as bright and clear as I have ever seen.
There was one "star" which was not like the others. It was clearly moving in a very square pattern. That is to say, that it was moving in a very distinct four-point square pattern over and over. Like a surveyor would do. I tried to point it out to other who were there but it was impossible. The sky was so huge, and there we just so many stars out, it was impossible to get them to look where I was looking.
To this day I have no idea what that was. I have worked in aerospace with satellite systems and I know that whatever it was, it was no satellite. I don't know?
But that is the only thing I have ever seen that was inexplicable. As for the rest of these reports, I keep an open mind, sort of. But it is not something that I personally buy into.