This question may sound odd, but do I need twitter, facebook and google+ if I am a web-developer? I see many expert developers nowadays using it in working order. It seems like it's harder to stay in touch with customers, co-workers and potential customers if you don' use social networks. Am I right?
Reason why I ask is that I am totally not a facebook/twitter person, I find it boring and annoying. I understand that linkedin is usefull for career, but what about twitter and facebook? Are they needed for web-developer career?

What I am trying to ask is if I only use linkedin, own portfolio website, google talks, gmail and something like github, would I actually miss anything professionally/job-wise?

My thoughts are that I can just have my portfolio website where I list all my projects aswell as contacts page with my google talks/gmail account.
It can suit both fulltime job, freelance and own projects. So this way email and google talks is just enough. Am I right or not? Thanks in advance!