Perhaps this guy just isn't a very good buddy at all, with or without a camera, or their ideas about what makes a good buddy were just different from yours. As has already been said here, some people want their buddy right next to them all the time while for other people, being in the same general area is fine, all long as you know what's what beforehand, you can adjust accordingly. As a new diver without much experience in different environments, I haven't figured out yet what I like; I just hope that when I do figure it out, my buddy has got similar ideas.