It's strange really - as far as I'm aware I've never suffered a fear of heights in any format, but I do feel much more vulnerable when flying at a circuit height than at high altitude. I don't believe this is related to 'fly lower, glide less' but due to the fact that at 1,000' you really begin to appreciate the relative airflow that is holding you in the sky - when you're lower you realise how high those buildings are and that you are many times higher... whereas at higher altitudes it's easy to forget that it's the airflow actually keeping you in the air and the whole process seems much safer... I'm also a weirdo
Cheers, Jack.