I'm a fan of the whole package. Your feet are no more and no less lovely than the rest of you. Now that you mention it, I've never done anything kinky with feet...
Whatever anyone enjoys is their own business, as long as it doesn't spook the livestock. I'm pretty open-minded, I'd try almost anything a partner wanted as long as it didn't involve inflicting or receiving real pain or humiliation, or is disgusting. I might find it doesn't do anything for me, but there's no harm in experimenting.