Favourite movie or series

In my free time I like to watch series or movies about different genres such as comedy, romance, fiction, suspense, etc. Well, I'm not a film expert to criticize and say what is the best movie, for me is difficult to choose a tittle to declare “my favourite” because I think that each series or film has it's good and bad side.
If you ask me about a series or movie that I really liked, it's one I saw a few days ago called "A beautiful mind".

It's a 2001 film directed by Ron Howard. It is a drama based on the story of the mathematical genius John Forbes Nash Jr. (played by Russell Crowe). The story begins when Nash was a scholarship at Princeton University with Martin Hansen, where he meets a group of promising mathematicians and students such as Richard Sol, Ainsley and Bender. He also meets his roommate Charles Herman, with who he begins a friendship and plays an important role in his life. He had to make a publication with which he made an amazing discovery at the beginning of his career and became famous around the world. But his rise to the intellectual stratosphere underwent a dramatic change when his brilliant mind was attacked by schizophrenia. Nash fought to recover with the help of his wife Alicia, went trough ups and downs but after many years he managed to overcome his situation.
I liked it because it plays with the mind seeing everything from the perspective of Nash, generating a great confusion between what seems real to him and what is real for others. The mind comes to doubt even of oneself, everything we see is real? What if it's just a product of our imagination?