I've been doing a lot of commissions, with two as a failure due to people suck and can't pay me and expect time and effort to be frrrrrrrrrrreeeeeeeeee, but in the end, I get two kick ass art pieces to sell on Etsy!
But yeah, I was nervous to even think to do something like that, but I find that I am pretty good at doing conceptual pieces for people, or at least, fill in their wishes with my art work and people like my style enough to want to get a tattoo design from me, wee.