What really pisses me off is that every time you go to a bathroom there is no loving mirrors.
Garry's Mod's map gm_construct has a mirror, Gmod Tower and Gmod Cinema has working mirrors and Cinema has a reflective floor in the lobby :D
Also, Blockland v0002/RTB 1.x has your player rendering in first person, but there's a parameter you can use in a player type script that renders your player in first person, it's not like it used to be
You can see inside yourself, but if you look down, you'll see your backside