I think I got an answer to that question its the Colour,to me I like women with or without stockings,panties,leggings,dresses,shorts,jeans,lingerie,street clothing casual or dressed up,when it comes to stockings its the laced stay up part or the Cuban heel or the seamed or reinforced toe,etc if you get what I mean even shiny or not shiny.
You fantasize what you see then that's what you want such as your in a hospital and some hottie nurse bends over to do something and you see her white laced stay ups against her nice tanned skin or see her nice white clad pantyhose bottom sometimes with a noticeable thong or not under it,figure skaters in flesh colour tights or gymnasts with nothing,all drab colours but swing!
Think about it Cami in a red lacy bra + matching thong + red stillettos then change the combo to black or white or blue add stockings or not,then just her in nude stockings with white stilletos wow heart attack time,many bookings for all these combos and the only difference COLOUR