Name pretty much explains the idea, It would be nice if you could choose to hide or show yourself in 3rd person.
Sometimes when I personally use the perspective feature, the character blocks off some of the screen. As I use 3rd / 2nd person view to inspect my surroundings, this sometimes annoys me in scenarios of mining, pvp chasing, fighting etc. Not sure if this is completely possible, but it would be a nice feature to add to Lunar.