When I hang out with someone, we tend to spend a lot of time trying to find something we would both like to watch on Netflix. 

Netflix already makes suggestions for things you might like based off of things you've watched and things you've rated. 

So, I'd like to be able to log into my Netflix, add another users' account and have Netflix suggest things to watch based off of two (or more) Netflix account's watched and ratings. 

To further this idea, it would be nice to have Netflix expand this into the dating/friendship and have an option where if people are single or looking for friends with common Netflix likes, they can log into their Netflix with their Facebook/Social Media and have Netflix match people or people with mutual friends, based on their viewing preferences. 

Similar to how Tinder tells you if a person have the same likes or mutual friends. We as Netflix users can give permission for Netflix to access Facebook information like friends, and use the information they know like things we've watched and liked to "match" us with friends or people with mutual friends that have similar Netflix preferences.