I'll go with...my own.

So far, works from anywhere (and on Android, iOS, and PC's), encrypts my regular internet traffic, connects my network shares on my home server, allows me to maintain a "help desk" VNC connection to anyone I've given VPN access to on my domain, simple Active Directory control, and lets me share very large files in a secure way without needing to buy additional space on Dropbox or Onedrive.

I know not everyone would or can do this, but for those of us who have the means, this is an ideal and cost-effective setup.