There are definite advantages in GA to being small...despite needing a collection of cushions to reach pedals, see over cowling etc. I occasionally get to fly in the R22 with large students who can't fly with anyone else, or they'd only be able to take about a teaspoonful of fuel! A female friend and I manage to tour on the continent in a C150...but only because I'm on a constant diet; I must be the only woman in the world who wants to lose more weight so that she can carry more fuel in her aircraft.
There was even a job going flying R22s in Florida, the only requirement being that you had to be under 140 lbs. It was carrying photographers and equipment around; they couldn't waste the weight requirement on mere pilots. Must admit, I was sorely tempted.....