Anyone else relate to this or am I in a minority of one?
Definitely not,
dakgg, in fact we had a thread on this a year or two back, and it seemed the majority of us shared your fears.
Re helicopters, I was once sitting on the ledge of a Whirlwind flying over the Hong Kong New Territories enjoying the view of the hills and beaches (I was secured by a strop). Then as we neared Kai Tak and started flying over skyscrapers there was suddenly an idea of height. I rapidly slid back inside the aircraft and stayed well away from the edge till we landed. Weird.