I discovered Wizyakuza at a festival and was immediately taken by them. Their artist does absolutely gorgeous work. I especially love the 3D prints; they can change between two or three images depending on the angle. Their material is really solid and sturdy, with beautiful color quality and resolution, but they're also light enough that you can pin them to a wall by pressing thumbtacks into the wall above and under them, using the edge of the tack to secure them against the wall without poking holes in them.
I got six at the festival (they were very kind and gave me a free one for getting so many), and then ended up getting six more after viewing their website. Will definitely be considering them for birthdays and Christmas too.