For me, group diving is the worst way to dive (in a buddy sense). It is far too easy for everyone to feel they are watching someone while someone is not being watched.
Diving with a photog isn't always that bad. My recent involvement with dedicated ones has really opened my eyes to a new way of diving. Some in particular ares very interested in macro photography and have taught me to slow down my dives and look a lot more closely. As a result I am seeing far more interesting stuff than ever before. My sac rate has also decreased quite a bit because I am swimming slower and hovering more (which means longer dives). It's quite a shocker to switch modes and dive with someone who motors all over the place willy nilly looking for big obvious stuff.
An important part of our pre dive talk is what the goals of the dive are - that's when you decide whether you can stay on the same page or not. One might say "I'm looking to shoot nudibranch's" or "I'm shooting wide angle wreck shots" etc... and then I can say "Ok I'll look for them" or "Do you want me in the shots or to the side" or "I'm not into that, let's do a same ocean dive".
Here's a video of two of us looking for Lumpsuckers, a fish I had heard about but never actually seen. I don't know if I would have ever seen one without a photog's influence. To find one was our overall dive goal, my buddies sub goal was to shoot macro of one, and my sub goal was to video our search for one. It worked out well for both of us.
[video=youtube;IQI03T-BZZs]https://www.youtube.com/watch?v=IQI03T-BZZs[/video]