I work with and teach about certificates on a nearly constant basis, but I don't actually leverage the technology at home.
Hell, I could even understand the viewpoint that such a thing isn't needed at home. With the way the world is changing I'm - personally - less inclined to believe that at this point.
I don't see where I necessarily needed to be validated by one of the massive public CAs and GPG would seem to be a great fit for the things I want to do (largely using digital signatures).
Before I install Gpg4win I was hoping someone here might have some feedback about the quality of the platform or even just that you're content with what the software provides.