Always thought I have a pretty good eye for whether things are balanced or not, a picture hanging a little bit askew, deciding on the fairest way to divide something six ways (five siblings, you see ... ) I know I DON’T have an eye for wrapping paper around boxes, but otherwise, pretty okay.
Then I took this test: The Eyeballing Game, found on Matthias Wandel’s woodworking website via xBlog: the visual thinking weblog, and scored an average error of 7.63.
Hmm. I think I’d better rely on measuring with rulers and protractors and levels for the stuff that really counts.