It wasn’t an easy decision to leave Google. During my time there I became fairly passionate about the company. I keynoted four Google Developer Day events, two Google Test Automation Conferences and was a prolific contributor to the Google testing blog. Recruiters often asked me to help sell high priority candidates on the company. No one had to ask me twice to promote Google and no one was more surprised than me when I could no longer do so. In fact, my last three months working for Google was a whirlwind of desperation, trying in vain to get my passion back.
The Google I was passionate about was a technology company that empowered its employees to innovate. The Google I left was an advertising company with a single corporate-mandated focus.
via MSDN Blogs.
This is precisely how I feel about Google as an outsider.