Google's Search Plus Your World (SPYW)
Google Plus Your World has been live since the beginning of 2012 and the take on it is mixed at best. We covered the basics of it in January's SE update so if this is news to you check it out here...
Many people just don't care if their friend or mom just bought a certain type of phone or +1'd a link about something. There is also the added negative pressure that many experts are very against personalized results.
Here's yet another fantastic TED talk on what personalizing search results and popular news sites is doing to us as a society. The video is about 10 minutes long and is worth the time to watch...
