I hate being over water. I'm OK in big jets flying to the US, but I really don't like crossing an expanse of water in an small aircraft. Flying to L2K this year was a major achievement for me.
But its not just flying over water that affects me, I dislike crossing bridges, I'm used to the Dartford Crossing now, but the Severn, Humber and Forth road bridges are too long for comfort.
In London, I'm the one crossing the bridges by walking on the kerbstones and on the Channel ferry, I'm the who isn't on deck. I couldn't lean on the rail and look over the edge of the deck. Sea cliff edges have the same effect too.
So I think I have a fear of being over water, but its amazing the feeling of security that 3mm of perspex gives you.