Playing around and enjoying creative approaches to problems.
I'm somewhat of a dinosaur on the panotools mailing list. I joined in 2001, at which time I did not know GUIs for the panorama tools existed. Therefore I painstakingly tought myself how to optimize and stitch using script files on a msdos command line. As soon as I had discovered PtGui, I gladly paid a few bucks for it and never used the command line scripting again. Lately I have begun trying the excellent hugin package. Simply because it's fun doing it all with free tools.
3d photography. I take 2 images a few centimeters apart from each other, line them up on my computer and print them out as anaglyph images (red-blue glasses) or next to each other for parallel viewing. To line up the images I use the panorama tools optimizer. I'll add the procedure to this wiki later.