I have 13. The only ones I regret (although, I don't at the same time) are my feet. Purely because they blurred and you can no longer read them. The artist totally misinformed me.
Fortunately, the rest I love. I'm planning on getting a half sleeve on my left arm, I already have a butterfree up there (on the inside,just before my armpit, yum). I'm just figuring out what I want added to it. It's going to be a long process of deciding and designing!