JeffG:Similar Equipment. Its good to have consistancy....Lights in the same place...Knife in the same place...
For example...I have a buddy that dives a Mares Dragon Fly...I always have to ask him how the thing works.."just in case"...So similarity breeds familarity...which leads to "comfort" with your buddies gear...which leads to comfort in the water.
That makes sense. My regular dive buddy and I have been diving for about three years. We have very unlike gear, but we practice skills on every 4th or 5th dive, including bcd removal and ooa stuff. SO we are very familiar with each other's gear, but we don't have any similiar configurations.
Thanks, I'm going to bed now...