Like several above I cannot stand heights. Mrs F does all that is needed up ladders or wotever.
I have come to the conclusion that in my case it is not just a fear of heights but a fear of falling. Provided I can strap whatever it is on my back end of problem. I even managed an aero tow in a Dagling to 2000ft over Cranwell North when I was 2 i/c the Gliding Club there in 61 ish. Deliberately getting airborne without any indication of IAS or height was an issue but nothing else.