How many of you know when you get on the plane how full the plane will be? Not that it makes any difference to know it, but I like to know ahead of time if it's completely full or fairly empty. Most times, you can tell by looking around the gate area, but not always.
I usually go take a ;look at the computer screen where the GA usually scans BPs. When he or she opens the door and walks down the jetway, that's a good time to saunter over and see how many BPs have been issued, how many throughs there are, and do the math.
Again, not that it makes any difference, but it's good to know.