We just want to search. Or keep using email like we have been for a decade. People switched to Gmail because it was like hotmail with a nicer interface and a large mailbox limit.
Maybe some people do want those other things. That's fine, give them their own corner, let them play with the toy social network or social layer or however you want to pitch it. Stop force-feeding it to the rest of us. I don't want to know what my friends are searching for or what recipes they like. It's just unwanted noise.
And let's call a spade a spade - "sharing" has very little to do with friends and everything to do with advertisers. It's very disingenuous and insulting of Google to pretend that the primary purpose of +1 buttons is to "share with friends".