...being left-handed.

Ok, this is kind of an odd one, but allow me to explain... I'm doing a first aid course at the moment, and twice today the instructor said 'because most people are right-handed they ____ '. Both times it made injuries more severe (because of the placement of the heart or spleen or whatever). Probably there are things made worse by being left-handed, but still.
Plus, it's cool to be different :)