The higher your elevation the less of the earth is in your way. The most extreme example is being in orbit, then you can see a vast amount of the earth at once. The same principle applies when you increase elevation to lesser degrees, you get a broader view of the earth.I don't know what "see over a lot more curvature" means.
I don't know what you're saying either when you say the horizon always rises to eye level. There's no reason it would.
Who knows. It's not like you're posting pics of your observations or anything so I've got nothing to go on here.
Dude you should know what he meant by Pear shaped if you watch the video where the quote is mined from. He clarifies what it means. No NASA didn't have to tell him anything. Since i don't think you're going to make the effort to look up the video on your own i'll do it for you.
It's 5 minutes long, if you watch the whole video you will figure out that the Flat Earthers lied to you and Neil did not say what they claim. If you want to speed it up go to like 2 minutes 40 seconds in for the infamous 'Pear Shaped" quote and watch the part after that. He talks about how you couldn't even feel the mountains if you had a hand that could hold the earth, the point of that is that the earth is only slightly 'pear shaped' in that there is this tiny bulge below the equator that you could only find out about with scientific instruments not the human eye.
"Cosmically speaking, we're practically a perfect sphere"-NDT
I wouldn't know much about your video where hawking supposedly admits Ptolemy had a good model but it isn't proving anything really.
The distance to the sun wouldn't do anything, other than maybe the atmosphere thinning out a bit higher up in the mountains and allowing more sunlight to directly hit you. Maybe that does something, I wouldn't know.