Good question. I agree with Victoria L - I use my maiden name as middle name on quilt labels, but I don't use it otherwise. I use my 'real' middle name on everything else + my married name. When I got married a million years ago, women had not started keeping maiden names when they married.
My DD kept her maiden name when she married, which has really simplified things now that she's divorcing her horse's A about-to-be-ex. She has her own business in her own name, so she doesn't have to change anything regarding the business.