here's a list:

boobs: gotta love gravity and realistic breasts, it is always very pleasant to find a part of yourself reflected in a drawing cause you feel seen so i try to do that..
intimacy: this actually can apply to dubcon/noncon scenarios.. we love vulnerability either in a negative or positive way. it makes the piece even better
cute/funny interactions during group sex: i love it. it makes it a bit more realistic, if you ever had a threesome or group sex you know it
coziness: it gives a little extra to the piece, makes you want to hang it in your living room
tears during sex: no matter if its joy or sadness, makes the piece 10 times better. again, vulnerability is top
vulnerability during pegging: 90% of the pieces of this theme are so boring, i want tears, touch, feel skin to skin. make me want to cry out of cuteness