If your photographer just expects to pitch up at the wedding to take photos without taking the time to get to know you, you should see red flags. That means that there is a very high risk that your not going to get the photos you expect. Every wedding is unique and should be photographed in a different way because it should reflect your personality. Your photographer should become your new friend, even know a personal joke between you and your fiance. This might seem strange but the better he/she knows you the better they can personalize your photos.
For example, I have a wedding this weekend where I'm going to take photos of a bride and groom on a motorcycle. I would not have known that their weekend hobby is biking if I didn't take the time to get to know them. Make sure your photographer knows the style and decor of your wedding too, this will help them get a feel for the ratio of black and white to color photos that will fit your wedding.
Here are some questions that your photographer would need to ask you:
You and your partner's occupations.
Some of your hobbies
Colors of the wedding
How many people will be attending
Feel of the wedding your going for with the decorations
Color Ratio for photographs: 80% Color / 20% Black & White
50% Color / 50% Black & White
20% Color / 80% Black & White
Dress code for you and your bridal party
These are just some of the type of questions your photographer should be asking to make sure he/she is prepared.
Do your research because the right photographer will want to know as much as possible to make sure they give you the photos of your dream day on print.