tl;dr for this wall of text is that Google+ is better than its competition because the interface is clean and simple and effective, even if it suffers from some integration bugs.
Myspace and Facebook are so completely full of spam that I can't stand to use either site. Google+ is clean and simple. It doesn't have all of the ridiculous personalized pages that look like the horrors of 1995, and it doesn't fill my screen with hosts of notifications about quizzes and other remarkably stupid "apps". The limited advertisements don't really bother me; it's the actual *content* of Facebook that is painful to experience. Google+ doesn't let people post on my wall, either. Every person has a stream that they fill with their personal information, and just like tagging in dwm, I can choose to view your stream when I feel like it. On Facebook, I either need to constantly mute or unmute people and posts when I want to interact with them, and it gets messy even in the first day of use.
To be clear, I enjoyed Facebook when it started. The only odd feature it had was the "poke", which wasn't even all that annoying. Google+ is like the original Facebook, but with good permissions control. The important privacy note isn't that Google has my information, but that I can control which of my communications are visible to a specific subset of my contacts.
If you're actually concerned about privacy, you really shouldn't be putting your data in someone else's storage in the first place. This includes sending email anywhere for any reason using any service. Sure, GMail keeps all of your data on Google's servers, but even if you run your own POP and SMTP servers, every message you send gets bounced around at least half a dozen times through major SMTP gateways, all of which store every message that passes through (for legal reasons). There never has been anything really private about email, and GMail doesn't stand to change that. (Where the comparison to Outlook 2010 came from is beyond me. I use it at work, and it's a complete disaster of an interface.) Facebook also routinely sells your "private" data because it's a great source of revenue. At least Google restricts their privacy invasions to automatic text-processing services.