What am I lacking? (Patreon)

Been thinking about this a long time. While I love the variety of content I create, I always feel like there are certain type of transformation/expansion I forget about. TO help rectify that, I started the suggestion box however, sometimes I feel that also can get a bit repetitive. 

One that I know I've been lacking is possession, but, I do have something rendered that I think counts. It will be posted once I hit a certain milestone in watchers on DA. What else though?