I had a few requirements I wanted in a photog - well product wise. Obviously talent was a top requirement!
Anyway, I wanted:
1. all of the images on a CD/DVD, along with a some edited/corrected pictures. With the ability to print them out if I wanted to do so myself
2. the ability to produce a big canvas, where the picture wraps around the edges.. i'm sure there is a term for this
3. A coffee table book
When search I found a lot of photogs that did invites, guestbooks, etc and all that wasn't important to us. I also found that a lot of the packages weren't condusive to what we wanted. In the end our photog created a "tara and joe package" for us, which was awesome.