We use docs for work. I hate it. I can never find where a document is hiding (is it in drive, docs, associated with which account?). I much prefer a local file structure that I can navigate from the command line.

Some tools break on Firefox at times. There doesn't appear to be any offline mode for me to store and work on my documents locally when I am on the road and don't have a reliable internet connection.

Gmail. I pull into thunderbird via imap. It's just another back-end from my perspective.