I recently switched from Dropbox to Onedrive.  I really preferred Dropbox but couldn't justify paying for their plan as I was out of free space and was already paying for Office 365.  I'm still getting used to OD, it caught me off guard that I had to tell each computer that I needed to download the files and not just have a link.  I was away from an internet connection with a tablet and need a file off of it when I first realized that's how it works.  Also, it took a extremely long time to upload everything to OD, and from the research I did it's a limitation imposed by OD and not my connection.   

As far as Google Drive goes....  I use Chrome and Gmail... they know enough about me without giving them my files too.