Again, it is interesting to see people state their opinions, yet have absolutely nothing to say to back up their remarks with.
As I have stated in a similar thread in the shotgun section of these forums, handguns offer definite advantages over a shotgun when it comes to home defense. In your average home, unless you live in a "mansion", you are operating in very tight quarters. A shotgun is going to be far more cumbersome to handle and deploy effectively.
Accessibility, though, is really the clear advantage the handgun has. It is going to be far easier and more practical to store a handgun in a safe and accessible location where you can easily retrieve it, than it will be for the far larger shotgun.
And a handgun in your hand far away beats out a shotgun in a nearby closet or safe.