I think Greg Gershman put it best when Google Buzz first launched:
There is a serious issue with taking an app that is not concerned about identity (GMail) and trying to make it one that does (Buzz).
Give credit to Google in that they have been quickly incorporating feedback. But they would have done much better to not have launched with auto-follow, automatically connecting public content from Picasa and Google Reader, and turning Buzz on by default. I turned it off immediately and I know others that did the same.