Hi, I'm Danmichaelo. I'm mostly active on Norwegian Wikipedia, where I'm administrator, but I spend quite some time on other wikis as well. On Commons, most of the photos I've uploaded are transferred from other free sources. Sometimes I also scan figures I happen to come across in old books, or extract them from PDFs scanned by others. I've done a few figures myself using matplotlib and Inkscape. Of course, I'm also tempted to upload my own photographs from time to time, but I have this bad feeling they are the least useful contributions I make here :)
Apart from uploading, I do categorization, template work and localization to nb.
For historical reasons there are two language codes for Norwegian Bokmål: "no" and "nb"
On Commons "no" is used in templates, etc. "nb" is aliased to "no" somewhere (I don't remember where), so "no" messages will show up for both users with "no" and "nb" as their user language. On the other hand, "nb" messages will not show up for users with "no" as their user language, so that is not a good idea. Ideally, the aliasing should have been the other way around ("no"→"nb"), but since so many templates already use "no" it would require lot's of work to change I guess.
{{Artwork}} is an alternative to {{Information}} template used for the description of images of artworks, especially those residing in museums or galleries. Faithful reproductions (without specific creative contribution from the photograph) of 2D art only require a license for the artwork, like {{PD-art}}. Copyrightable photos of 2D art and photos of 3D art (sculptures, structures, coins, gems, etc.) require a licence for the depicted artwork and a licence for the photograph itself. In such cases, {{Art Photo}} is recommended.
{{Photograph}} is an alternative used mostly for the detail descriptions of historical photographs, especially those residing in museums or galleries.