Cute stuff tends to do well. Not as well as pron, but it offers something to those not interested in commissioning sexy stuff :P

I think the probable with some of your pose’s are that only 1 or two of the spaces are seen as the ‘money shot’ pose.
The spaces that sell the best are the one’s of the oc getting fucked, or one’s that show the whole front of the body, dicks and all.
I think people would be more interested if you had more pose’s that show off the whole bodies from the front with someone clearly going into the person that way people know ‘oh cool my oc is gonna get fucked, whoopwhoop’ Because let’s face it people are kinky as hell and if they want to buy porn they want to see their oc getting the best parts XD

sexy poses! the Cute maid one was adorable <3

Sexy poses that show off your character well, can deffinetly be appealing to people. Costumed or other wise.

I tend to agree that your character actually doing or receiving sex does increase desire for the pose. When you watch auctions, those spots can go for way higher amounts of money. Look at your tentacle picture currently available. Which slots went? well the pentration picture and the one with the character on all 4s looking like he/she is going to get pentrated soon. Plus maybe pose 5, for similar reasons. No character is having a tentacle forced in thier mouth. Only 1 penetration picture.
Since we're here... thinking kinky preposes, cuffs and collars. maybe use of toys. I would buy a naked bondage spanking picture.
Another weird thing some do, is a all pose buy out. For instance, lets take the 5 pose tentacle picture. If i have 5 or more characters, or say me and my friends have 5 or more characters, I might be willing to buy out the whole picture. Some artists have offered this option of a all pose buy out option, which effectively over rules existing current buyers. I realize, it kind of sucks in that if it's a 3 pose piece, and someone grabs slot 1, you would kind of like to get the money from them, partly to know they are serious.Which... brings us to a semi strange option 2. Namely, offering if you like the prepose, and want a full buy out, you will talk with the buyer and do a bit of a rework, for s similar pose for them.
I'm weird in that i have pictures of my character drinking beer, cooking in a chefs coat, doing a medieval blood letting, doing karate, as thor, DJing, even as a version of iccarus (from greek myth).
So, often i like variety. But, that's more me specific. (although my thor picture was a prepose)
Well, i think i muddled this comment fairly well. I'm sure you're thinking, how can someone talk sooo long and say almost nothing new?