I clean my bike before taking it to the shop. I have to admit, I don't keep it clean all the time because it's time consuming. I do the maintenance part of cleaning -- dry it off after it rains, get rid of mud before dragging it through the apartment, lube the chain, and make sure the rims are clear. But my bike gets a full cleaning only a couple of times a year, but definitely when I take it to the shop.
I also give my teeth an extra brush, floss, and use mouthwash twice before going to the dentist. I do oral hygiene regularly, but give the fangs an extra polish before heading out.