My wife had breast cancer back in '96. She had chemo and lost her hair; but she always wore a wig in public until her hair grew back. I think it is a big mistake for women to go around bald or with a hat. People see them and immediately think "oh...she must have cancer.." Their reaction is like a reflection back to the woman of "you look like you are dying of cancer". People always told my wife she "looked great" and I think this helps the cancer patient to keep a positive attitude.
Also, with so many out-front lesbian/dyke types running around; the bald look makes some look "dykey" (like Carly).
Here is the thing..
It is a personal choice
nuff said....