> If we know something of your interests (based on G+ and/or search), isn't suggesting more relevant content to you on Youtube (as a purely hypothetical example) a good thing?
No, it's not. When I search for something, I want the most relevant results, not what you think are most relevant to me. I'm a liberal, and I tend to visit more liberal sites for political information - Crooks and Liars, Daily Kos, Huffington Post, etc. for general news. I'm also more likely to share links to those sites. But if I'm searching for information that could be considered related to a political issue, I don't want Google deciding that the most relevant results will only come from left leaning sites when a conservative site may have better information about a specific issue.
I believe someone even gave a TED talk about this issue.
No, it's not. When I search for something, I want the most relevant results, not what you think are most relevant to me. I'm a liberal, and I tend to visit more liberal sites for political information - Crooks and Liars, Daily Kos, Huffington Post, etc. for general news. I'm also more likely to share links to those sites. But if I'm searching for information that could be considered related to a political issue, I don't want Google deciding that the most relevant results will only come from left leaning sites when a conservative site may have better information about a specific issue.
I believe someone even gave a TED talk about this issue.