Although it's nice to be able to control what skins are shown on your profile, I think it'd be cool if there was a feature of the website that shows a player's entire skin history. Currently there is a website that uses this idea although it isn't entirely accurate and could definitely be improved on.
I'll just leave the website sere as reference http://minecraft-skin-viewer.com
People can remove their previously worn skins on their pages. A way for other players to see their entire skin history kind of defeats the purpose of that. I'm sure many just like myself would not like their skins stolen more easily.
I mean, It's nice to see your previous skins, but I would only like this feature open to yourself, not to anyone else to see your old ones/new ones x3