OK as a photographer just have to jump in.
Have heard the phrase "you're the photographer you lead" then all I see is fins and have to swim full time - snap a shot or two on the fly as we go rocketing by the interesting stuff.
Or a better one, "I dive slow too" - yeah right - slow means you stop and look, STOP KICKING and hover maybe spend a minute or two looking. Its hard to see what is hidden - most cool stuff is extremely well hidden, just swimming by you will never find it. Maybe spent a minute or two in one spot, maybe longer, let the creatures get used to you and start moving again so you can see them. Diving slow does not mean that I swim slightly slower than flat out all the time, it means stopping and actually looking.
Being a buddy with a photographer means knowing that they WILL stop for a minute or two and actually look at something interesting, spend 15 or 20 seconds getting the shot - a tough shot may take even longer. This means you need to stop too, maybe look nearby and see if there is something interesting in the neighbourhood. Diving does not always need to happen at warp speed. Diving with a photographer means you will likely see WAY more cool stuff, because they are actually looking, rather than crusing
As a photographer my responsibility is to look up regularly if I stop to take a shot, let you know where I am. Won't spend 5 minutes getting the impossible shot. Will be aware of lights. Will be a buddy. I know where you are - can you say the same? Most can't unless you tap them on the shoulder or flash a light at them to say I'm stopping for a bit here you have to stop too.
Frankly I dive mostly solo now or with other photographers. Too many times I have faced the choice of get the shot or chase down a buddy who left me behind without even noticing my absence. For a while I chose chase down the buddy - now I choose get the shot unless I am with a new diver. Other photographers know what diving slowly means, they pay attention to the little things, the hidden and unique. Have met very few non-photographers that do this. One comes to mind, but she bought a camera so doen't count any more

.
Disagree with Motivation here. If I am shooting, for the period of time I am getting the shot I am not paying full attention to my buddy. Not possible. The trick is to make that moment of inattention be as short as is reasonable and keep some part of the brain tuned to your buddy. Even your description of how you take pictures confirms this. "If I come up from a shot to find consistently find myself alone" - if you are paying attention as a full buddy you would know when they left - hard to do when you are getting the shot. If you didn't know they had left how would you know they were having a problem while you were taking a shot?
Am jealous though, a buddy that dives slow and is interested in mask to the floor diving!!! Value that buddy!
I got so pissed at buddy diving I decided to stop worrying about it for a few dives - just take the pictures I wanted and see what happened. Stop chasing after wandering buddies. You want to chase all over the reef and miss the good stuff - feel free. Lasted through two dives and now I dive either with photographers, or solo, or don't worry about pics and just enjoy the swim - 'cause it aint diving in my mind - its swimming.
Rant over
PS This was the only nudi anybody on the boat saw in a week of diving in Belize. Diving slow means you find the unusual. From 6 feet up swimming by you miss stuff like this. (The shot is actually upside down)
http://www.daconsulting.bc.ca/Dive/BelizeBlackSpottedNudi.jpg