I was obsessed with Google and Gmail was my e-mail hub even as a Microsoft fanatic. But with the launch of Windows 8 things have changed as I finally migrated to more Microsoft services (Outlook.com, OneNote, SkyDrive, etc.) from Google (Gmail, Notebook, Google Drive, etc.). And now I really love my Outlook.com Inbox (thanks to Windows Live Admin Center).
Today, the only thing by Google that I really use is the Google search apart from their tools and products (AdSense, AdWords, Analytics, Webmaster Tools, etc.) for marketers and webmasters.