Had you ever considered making content including non-human species, like nagas/mermaids/centaurs/angels and so on? I bet that with your photoshopping skills that won’t be very hard for you - just take a horse or snake for example and take away it’s head, putting human on top of it a human upper body part, or just add wings. I believe that those will be very cool mpreg/vore/stuffing morphs if you’re into such fantasy creatures

The thing to remember is, I don’t make any money from this stuff.

For me to make morphs featuring non-human characteristics, I would have to want to make such content for myself first and foremost, and ultimately I just don't think I'm that interested in making something like that.