There are very few differences between right and left-handed. A proportionof those left handed become so because the left brain which look after right hand movement is damaged so right hand does not work and left is used. The left-brain and right brain have a few different functions. The left-brain look after speech and calculation and the right can recognize spatial phenomenon (recognizing the way etc) and enjoy music more, recognize pictures etc better. In general men are more left brained and women right brained.