Re: Does one's size or weight affect one's Aikido?
I think being in good shape matters, no matter what your size. It makes sense to me to make the most of what you have got and develop your aikido to match your body shape.
I'm 6 foot flat and quite lean. A very similar build to my own instructor in fact. Our aikido has differences to say, a friend of mine who is short and stocky.
Good health is good health.