About 6 years ago, I started wearing skirts exclusively. It started as an experiment for me to see if I could do it all the time and to see how people reacted to me. I was pleasantly surprised how easy it was as well as how people viewed me. At the same time, I had a 5 year old daughter and a newborn one. I put them in dresses, so now it just seems natural to all of us.
I will say, though, that my 11 year old does occasionally wear jeans. Actually she prefers those, but she knows that we have rules for dress and she is expected to follow them. I will allow her jeans when she goes horseback riding, camping, fishing, etc. But on most normal days, she wears dresses. My other girls only have dresses and leggings.