Style: Some are more forward and direct and organize photos. Some very traditional formulation, while others use cameras and exciting prospects. Some stick to the traditional colors of editing, while others gravitate more effects, black/white or sepia. You can get some flexibility from the photographer, but do not expect a photographer whose style does not fit your needs to change drastically.
References: The best references from people who have used the photographer. If you've heard about them through a friend, they come highly regarded. If you find them through the search, ask to see examples of the images and talk to the bride or other persons to whom they have worked with earlier.
Service: Think about what you would like. Take care to think digital laboratory will allow the images with the same quality as a professional photography lab, which color balanced images and uses a high-quality non-glossy printing processes.
Cost: You may want to set up a scenario and ask a couple of photographers priced their means. Be careful here as well: the cheapest photographer may not be the best. You want to find a combination of value, quality and range of products.
Product Choice: If you are mainly interested in digital prints, it is highly recommended to choose a photographer who can produce good large prints and albums because of their experience in making these images show; they have skills and resources to produce good products, whether they are electronic or printed.