Even though I drive an automatic, I always apply the handbrake when I park, it's just second-nature like locking the car when you leave away from it and not leaving the windows down (expect perhaps when it's in your own driveway). It don't see how it's being like a "woman driver" (not that I disagree with this stereotype ) and the ground can often slope a little bit even when it looks flat. I know with automatics "Park" usually stops it rolling foward but I don't see what harm it does, handbrakes usually last for years before they get slack. I don't think I've ever seen anyone not bothering to do it, when I was learning to drive instructors would even tell me to put the handbrake on while waiting at traffic lights (because you to have find the "biting point" before you set off and all that).

By the way, I don't why Americans call it an "Emergency Brake" because I don't think it's a good idea to apply the handbrake/footbrake/parking brake while the car is in motion, especially not when cornering unless you're doing stunt driving and you know what you're doing.