I'd imagine if most of us are writers, some of us aren't the most social people in the world. Sure, we may have friends and such, but the reason I got into writing was to create my own worlds and explore them. I think my initial thoughts were I'd get published, becoming rich, and just sit in my giant house all day writing books.
I think the days of Emily Dickinson and Ralph Waldo Emerson are over. It's a mixed bag. You can't be too social and risk overexposing yourself, but if you don't promote yourself (especially self-published guys) then no one will even know you've written something.
What are everyone's thoughts? Can you be a hermit and still become a successful writer without branching out to promote and network? Or must you be even more social that writers of the past because sometimes people buy books from people just because "they like them?"
For example, if you went to a book signing and an author was rude to you, but you really loved his work, would you buy another book from him?