There are a lot of people who liked The Secret Life of Walter Mitty so much that they started looking for films that may be similar to it. I personally like this movie because it shows that people would like to escape from the life that we are living sometimes.
There are moments when I want to escape from my life too but I know that I cannot take that vacation that I have always dreamed of because I have responsibilities to think about. It helps me realize that daydreaming is free and it can be enough not only to relax but also to inspire from time to time.