For me, it was a choice between capacity or power. In self defense situations where adrenaline runs high and you may be facing multiple attackers, I tend to choose capacity over power...hence my choice of 9mm over 40S&W....and why I do not use a .45 for carry or home defense/night stand gun.
Man once surrendering his reason, has no remaining guard against absurdities the most monstrous, and like a ship without rudder, is the sport of every wind.
-Thomas Jefferson to James Smith, 1822.
We cannot solve our problems with the same thinking we used when we created them.