Personally, I don't nofollow ANY internal links, and I only noindex my privacy and search results pages. And I do quite well.
Don't worry about pagerank or "juice". It's not going to make a significant difference anyway. Make it easy for your users to see who you are and what you're about, no matter where they are on your site. They don't have to be in an inch high font, but they should be there. They're trust signals, albeit small ones, and they add up.