I tend to gravitate towards either group stuff or fixed price individual stuff; I'm not a particularly affluent commissioning 'whale', especially after burning through most of my accrued spending money over the last month. :P Anything $20 and under will always catch my eye, and under $10 will get my full attention. $5 stuff is basically impossible to resist as an impulse buy. Group pictures tend to have opportunity to defray the costs by getting into a small side position, as do pieces where you're basically just altering a base model for multiple slots.

Anything that can appeal to particular interests, though, those are always even harder to resist.
Anything with a good rear-view to show off being a herm, or that can work as having vorish undertones if not explicitly vore related, in my case. Also, water scenes. *cough*

Thanks for the feedback! Yeah... I'll have to see about the types of scenes I work on next. ^^ Good info!