>>49929231I have a few thoughts about that very subject, how pleasant it is to look at soles straight on and the wrinkles on the soles depends entirely on the skill of the artist, generally speaking the use of thick black lines to give contoure to the wrinkles is a bad idea, and the angle from which the soles are looked at can be rotated to include more of the girl in question; specially her facial expression and part of the legs.
I know which type of feet pics you're referring to and it's the nightmarish deviantart types that give all of us a bad reputation overall.