It has recently came to my attention that tag badges are only awarded based on answer votes. For a site like Stack Overflow, that makes sense, as providing good answers is the perfect way to demonstrate that you know what you're talking about in a certain field. However, for this site, writing a good challenge can take a lot of work.
Can we get question votes to count along with answer votes toward tag badges? I'm not sure if this is as easily changeable as the amount of reputation awarded for question upvotes but it makes sense for this site.