Whether you know it or not, people take your recommendations seriously. And when you tell someone a movie is awesome, they might dedicate 2 hours of their precious life to seeking out that specific entertainment. You're responsible for that. Take it seriously.
Likewise, you have to be careful when taking recommendations from somebody. If you notice this person happens to like every single movie they see, completely dismiss this person as a trusted resource. This person might also claim to like ALL kinds of music. Stay away from them. You will be disappointed.