My license has no weight on it but the picture tells the story anyway. Just had my passport photo taken and it's 65 pounds lighter than my drivers' license photo -- noticable difference, but a toss up as to which picture is actually the most horrible.
As to your question, I agree, put something reasonable that you think you can stand to look at and don't worry about it since no one else has to see it.-- unless you expect to get arrested on a regular basis, of course.