Outlook interface is the worst. I have been using it because my school is using it. Every two months or so I see new frontend changes. The style/font/color jesus christ. No. Just no. As much as I dislike some of the recent changes in the gmail interface, overall Gmail is still quite usable.

And if one doesn't trust Gmail then why would one trust Outlook or Yahoo Mail?

The one thing I complain the most about GDrive is only one account is allowed to log in and use google drive. I just don't understand why Google engineers haven't fix this issue.