Nailer, that was one of the things that bothered me after I got certified. Even doing my AOW dives with an instructor, nobody did buddy checks. But you know what? Two eyes, and two brains, ARE better than one, and even experienced people with careful routines make mistakes. I've caught (or had others catch) unfastened dry suit hoses, unhooked-up inflator hoses, misplaced secondaries, backup lights that are on . . . All minor if caught and corrected, all more of a PITA to correct underwater.