There are various schools of feminism, some of which have conflicting opinions. But the common feminist standpoints, like equal rights, seem to be just common sense for me, especially in this day and age. I'm not sure where the requirement for equal physical ability fits into the equation.
At least for me, going out and saying that you are feminist carries a sort of special connotation, and since I haven't participated in any explicitly activist events related to feminism, I wouldn't readily emblazon myself with the feminist label even though I stand by those ideas.