What weapons should you use to defend your home?

What weapons should you use to defend your home?:
"The question about what the best home defense weapon is is a pretty hotly-debated one.
Some people thing it’s a .45, some people think it’s an M-16 or AK-47, and some people think it’s a shotgun.

Here’s what I think.
There are several considerations that you need to think of when deciding what weapon would be best to protect your home, such as:
Your experience and training
The risk of collateral damage
The effectiveness of the round used"