When I shoot square, i tend to print square also...
Probably because I'm too lazy in the darkroom, I do my cropping at the photoshoot, and then print full frame...
Also because square images for some reason "talk" to me and I often see my images in squares even when I don't have a camera with me...

I've even been known to crop 2x3 ratio images (either from 35mm or digital) into squares...

it's hip to be square...
(sorry, couldn't help it...)

PJ