I wore a full striped chef's apron when I was preparing a special dinner for my SO on Valentine's Day. I was already wearing what I was going to wear and still had to put the finishing touches on the meal.
Other than that, i dont really wear an apron..as I cook in my sweats
My mom bought me an apron on a trip to the Virgin Islands once. It is embroidered and just kind of pretty. I've used it when I'm making stuff w/ lots of flour and very messy- like cut out cookies, so I'm not covered in stuff afterward.
For the most part, I only wear an apron around holiday times such as Christmas and Easter when I make & decorate cookies & other goodies (such as Easter eggs) w/ my kids. I also wear one when they "cook" with me because they each have their own special one that they love to wear!