Netflix mostly. Amazon's service is a pile of shit because they mix in buy/rent stuff with the free stuff, force you to watch trailers for their own shows randomly and frankly it's a pain in the ass to use. They also have a massive hateboner for Google so they won't ever properly support Chromecast. Muh FireTV stick
If something isn't on Netflix I'll probably just torrent whatever it is I'm looking for. A lot of TV networks still don't understand they have a service problem. Not interested in subscribing for the 5 shows you make or buying individual episodes through your bespoke website, sorry.