I just wear whatever I'm wearing. I have a couple aprons but I usually don't bother to pull them out unless I'm making something really involved, canning jam, or doing involved baking, etc.
I am not a person who changes when I get home, but most of my everyday clothes are machine washable so if I get anything on them it's not the end of the world.
Actually, as per the gear discussion, it's important to me to be able to do things in my clothes - both as far as movement goes, and not worrying that I will ruin them. I want to look presentable, but I also want to be able to do things and not just be decorative.