I follow with interest the blog of John Chow dot com for several reasons. First you never know what he will post and second because he is upfront and genuine in his blog. I am sure, like all of us, there are sides to John Chow that we don't see, but what we do get to see is consistent which adds to the creditability of his statements.
What has this got to do with success?
If you are genuine you don't have to remember the exaggerations, falsehoods (lies) or omissions you have told someone to better your image in their eyes. You are free to express your likes and dislikes and best of all you don't have to spend a lot of time maintaining your facade allowing you to use that energy more productively. You also can more readily ask for help when you need it, admit mistakes so that you can correct them and attract people that appreciate you for who you are. Even if they don't like what you say they will still respect your opinion. People are always ready to help or support people they like or respect.
Behind every story of long lasting success is a genuine person.