My advice would be look for someone that understands your style. Speak to different photographers (even ones that have a portfolio you're not necessarily too keen on) and get to know them, seeing what ideas come out of those conversations. Personally, when I'm working with clients I talk with them, invite them to my studio space for a look around and try to understand what they would like to reflect in their images. Also, don't ever be frightened to say no! Sometimes photographers just are not the right fit, and a good one won't be offended and will understand.