Agree with many of the previous posts, in that tall buildings down to the humble step-ladder incurs a distinct queasiness in me. Yet I have flown in many a/c from microlights upwards and enjoyed every moment, even at extreme turbulence, angles of bank, inverted etc. I've never been able to understand this, but am heartened to know I'm not alone; seriously, simply going up through the loft hatch is put off unless absolutely necessary with me.