honest answer that also explains why furries are so closely tied in with people who have autism:
some of us really dont find human faces appealing. its hard to project ourselves onto something bluntly human. its why anthros and masks on characters seem to both be popular, especially amongst awkward people, because its easier to relate to it because its not a human face.
i think, by default, human faces might be relateable for a lot of people, but tismos (like me) cant get into it. when i play dark souls, my character always wears a mask. when i play terraria, its the same. when i play starbound, ill never choose human. always play khajit or argonian, wouldnt use sunglasses in payday, etc.
yes, this projection was huge, but you can take my word on it that this rings true for many anthro artists n stuff. theres also raw appeal/cuteness in animals but that almost takes a back seat. autistic rant/blog over.