I recently ran across a blog asking if you used a VPN, Why you used a VPN, Where you used a VPN, What VPN you used, and were you satisfied with it. Unfortunately, I can't find the blog at the moment, it may have been on Quora. However, the The consensus seemed to be VPNs were used in two cases, one when in "sensitive" regions such as China and Russia to keep out of trouble with overly sensitive authorities or when using public WiFi networks (hotels, airports, Starbucks, etc. to protect sensitive proprietary information. A lot of VPN services were mentioned and the users were pretty much satisfied with all of them but no one was particularly enthusiastic about having to use a VPN. There were comments praising one protocol or another but the protocols are public and pretty much available through any of the various services.
