One of my first big experiences finding out I can't see 3D (I have no depth perception) was watching the Spy Kids 3D movie with my Grandad. I was wondering why the 3D wasn't working, having been told the images would "pop" out of the screen!
My grandad said "oh must be broken" and offered to switch glasses! These being the paper glasses with red and blue, unless the colours stopped working they'd be fine.

There are so many little things that you miss out on when you lack depth perception, like the mad magazine 3D pages, ball games become super difficult but no one will understand why and the big upside is that you get use to it and in someways I've adapted to be more perspective of distance since I have to factor in several signs, estimate speed and judge size etc. With time even ball games aren't so hard anymore but there will always be a few weak spots.