While I enjoy my tinfoil hat, it seems that they're being open about the access given. This being said, if I didn't trust Google I wouldn't use them. I accept t

While I enjoy my tinfoil hat, it seems that they're being open about the access given. This being said, if I didn't trust Google I wouldn't use them. I accept that I am trading certain information about me (interests, usage etc) for the bevvy of free services they provide. What sort of information about me would the NSA be interested in?