It's not just you. It's a measured fact based on polling.
As a developer, Tyson and Dave's relationship, platonic or otherwise, is very satisfying to write. As a fan... Well it'd be best to ask fans directly but there are a lot of cited things that contribute to liking of Tyson. Kinks, to the fantasy of "turning" your bully, to exploring that dynamic in a safe way (though Dave suffers as the proxy), to even canines being typically one of the more popular species in furry media as a whole. Test it. Take a furry visual, look at the cast for the canine, and measure their popularity against the other members. Then ask why.
You'll probably start to see an interesting pattern occur, but there'll always be exceptions.