So here are my tips on how to choose a photographer, a wedding photographer.
Firstly don't feel pressured, take your time and shop around, compare all the different types of packages available, Google to your hearts content and create your own library of all the types of images you like.
I also strongly believe it's all about the Vibe, do you get a good feeling about the photographer? There are so many photographers out there in the market place and they will all be bidding for your business, you will need to find the one thing that makes you feel really comfortable and gives you a great vibe that they will deliver you more than just a great photos.
A wedding is about the Bride & Groom, it's your special day and the photographer you choose should be someone that you feel relaxed and comfortable with, in my experience and if you have given your photographer a good brief, they will in some cases end up running your wedding day, as they need to help with keeping the day flowing as a means to ensure that they get all the shots you want. It is important however that the photographer will do this tactfully and without being an interference or upsetting your family and friends on the day.
The next thing I would consider is style, every photographer will have a different style - some may focus on more the traditional set type shots, whilst others may focus more on capturing the emotion of the day. Ask the photographer to show you their portfolio and not just wedding photography.
If you have been able to see samples of their work, by now you should be able to asses the quality of their work, ask your photographer how many of their images have been edited (PhotoShopped), do they plan on editing your photos - some brides to be are looking for every image to be good enough for the front cover of a magazine, if so, that's great - but that type of look may come at an additional cost.
Last but not least it's about the overall package the photographer has to offer, set packages with set number of shots in my opinion should be avoided. This is about your special day and a unique day at that and your photography package should be just that as well, unique.
So to recap:
1) What sort of vibe do you get from the photographer
2) Personality of the photographer
3) Style of their work
4) Quality of their work
5) Packages available