What does 3D look like to you?

[lifepawn]

I'm not here to ***** about not liking 3D. Just curious what it looks like to other people because when I described to a friend what it looked like to me he said it didn't look that way to him.

When I look at 3D movies it looks similar to looking at a stage play. Like if you have a 2D scenery backdrop, some 2D cardboard trees a few feet in front of it, and 2D cardboard cutouts of actors a few feet in front of those.
For me the movies always look better in the 2D versions where they don't have those layers of separation between different parts of the image because it doesn't look natural to me at all. And nothing in it looks three dimensional to me anymore than 2D movies do. What do you see, if you can describe it?

This goes for every 3D movie I've watched. For the record, I'm also one of those people that usually gets headaches from it.