I kept my surname when I married DH, But all our kids have DH's surname - It is quite common nowdays. I think it depends on the reason 'why' you have different surnames. I kept mine because I grew up with it and have an attachment with it - it is part of my identity. I had no problems letting my kids have DH's surname however as they were a 'clean slate' so to speak, that name was and is to become part of their identity. They weren't giving up something to take on that name. Besides he is their father and has just as much right to have his name attached to them as I do.

Does that make sense?