The strange thing about height was if I was hoping around on and off a Ten pylon or up a tall ladder the thing would frighten me, however shinning up the side of a Wessex or working on the decking of the Puma and Chinook never bothered me, I suppose it was over a set height it effects me, however when the Pumas shed the doors after the Norway incident I transited down the UK in a Puma at 7000 feet sitting in the door seats facing nothing but a big hole and bar being a tad cold, the view and height didn't bother me.
Flying has never bothered me strangely enough.