How do you nicely tell your boyfriend that you don't want to use his tattoo artist?

It's not that his aren't nice, they are. I just want mine to be delicate and detailed (I want extremely small kitten footprints with very thin lines and all of my boyfriends tattoo's tend to have bolder lines). He swears by said artist. How can I nicely say I don't want to use him without it seeming like I'm insulting HIS tattoo's, which he loves.