OK -- which am I? Certainly a bit of both. One of the things I absolutely love about diving IS the solitude -- nobody talking to me, no gravity planting me on the ground (OK, I know that gravity is there but YOU know what I mean), no cats demanding to be petted! -- just me and the damn bubbles -- AND knowing that my buddy is close because I can see her light which means I know she is fine.
IF I see something I think is worth sharing of course I'll share but the diving experience is for me alone -- that is what I'm not sharing. I have conversations with myself -- I "hear music and there's no one there" -- I get to feel just me -- and no, I don't share that, the internal part of the dive. The external part of the dive? Of course that is shared.
Does there sometime become a conflict between the two? Yes, and as TSandM is fond of pointing out, the three of us (TSandM, her favorite dive buddy and I) were on an extended deco stop at 20 feet on a wall in the Red Sea kicking our way back to the boat (a 30+ minute kick). We started out abreast but for whatever reason, they fell behind and I'll confess it took a LONG time for me to recognize they weren't there because I had gone almost totally internal and I was, in fact, no longer a teammate.
So, sharer -- internalizer -- both.
BTW, Dan -- There is little better than doing Linked GS turns while floating down a steep, fast, well groomed run -- but doing linked turns while floating down a steep, deep powder run.......