I love them and I think you should wear them however you want!
Rock 'em!!!!
I want to cry every time I see someone wonder about "age appropriate" anyways..... They are gorgeous if somewhat plain BOOTS for goodness sake!
I wonder ~ at what age do I cut off all my hair, get a nice perm and a weekly salon 'do, start opting for "tailored slacks" and a "crisp blouse" etc etc etc.
I guess I am different though, and you DID ask, so down off the soapbox I come.
My opinion? Wear em and rock em!
eta: and you are not too old!!!!!!!!!!!!!!!!!!!!!! no matter what age you are!