I think feet are under appreciated for all they do for us. They just get totally abused all day long. Walked on, run on, toes get stubbed, things get dropped on them, they hardly ever receive lotion or massages and they almost never get adored. Some people forget to trim their toenails and really don't take good care of their feet, and end up getting foot fungi. It's really a shame.
I think the feet are the most abused and least appreciated part of the body.
... besides the asshole. That probably trumps the feet.
Let me just say thank you, feet. I adore you. You haven't let me down yet.