At 63 I probably ride mostly in
#3 position even if I like to believe it is
#2 
I believe my frame size is a tad on the bigger size, so I ride mostly with hands on top or on brakes and go into more aggressive position by bending elbows more, not by moving hands to drops. That would make my arms almost straight, but perhaps that is because I don't like to bend my back that much.
Reading the thread, all I can say, there is huge diversity of body builds and riding style. If you do long endurance rides, your position will be less aggressive than if you do fast fitness rides that don't need to be too long. In long endurance rides, you have more weight on the saddle that goes hand in hand with less aggressive position, and vice versa.
At this age, I got my first aero bars TT bike LOL with much smaller frame, hope I will be able to last on it for some 20-30 miles rides.