You're hardly alone in this, if that helps. Plenty of other people prefer anthropomorphic pornography, myself included! When I do dive into the internet for some porn, it's straight to the furry sites for me.
I am myself pretty (very) at odds with the concept of sexual relationships as a part of emotional intimacy as a whole. So, for me, I know I turn to the furry stuff as a way to "dehumanize" the sexual concept as it were. I see sex as much more to a base animalistic urge, so it makes sense that I prefer to see anthro-fied animals doing it rather than people. I also think that, as an amateur artist myself, it may be that I tune in more with the artistic side of it as well.
I can't speak to your own psychology however. Just know that your not freakish or weird or anything like that, thousands and thousands of other people just like ya out there who are doing just fine.