I love saying "foot bottoms". It's a very foot fetishy thing to say. Sometimes I'm in the mood to say "soles". Sometimes "foot bottoms". I'd say that "soles" is more of an artistic term, and "foot bottoms" is more endearing, personal, less general. Lately, I like to say "foot bottoms". I'd even say that it's similar to how there's a difference between cute and beautiful. If a woman has wide size 8 feet that are cuddly, pillowy, and wrinkly, I'd say "foot bottoms". If she is tall and lithe with size 11 feet that are longer, smoother, high-arched, I'd more likely say "soles". Sometimes, it's not even the size but the build and structure. Sorry to get off topic a bit.
As for who has the nicest foot bottoms...so many come to mind. For me, it's less about the person and more the setting and position. For example, I love the bunched up foot bottoms of sunbathing bikini women on their stomachs. There's a beautiful straight on photo of the tall, big-footed tennis player Maria Sharapova sunbathing in a red bikini on her stomach. And her big, soft foot bottoms look amazing, all bare and large and sunned behind her.
Thanks for sharing them here. 😀 
