I have my bike set up left front brake that is what I'm used to I'm right handed but when it comes to squeezing brake levers I'm ambidextrous. What I learned from reading Bicycling Magazine in the 80's is the front brake is your main stopping brake if you need to brake in a hurry and lightly squeezing the rear brake will help to tell you when the weight is coming off the rear if it starts to skid.