Loved this movie.
A film that challenges my status quo way of thinking and entertains me at the same time is a treat. From the amazing scenery on Walter Mitty's adventure, to the deep characterization, from the whimsical zone-outs to the day in and day out details of life, The Secret Life of Walter Mitty was a pleasure to watch.
Not everyone is going to love this little gem because even though there is action and adventure there are moments of thoughtful introspection which slows it down a bit. But the combo of the two elements is perfect in my opinion. I also appreciate that I can watch this with older and younger folks and not cringe every five minutes because of language or raunchy humor. (Note: it does have a wee bit of suggestive commentary and a few words that parents might object to.)
If you are looking for a movie that will leave you feeling good, check out The Secret Life of Walter Mitty.
If you like the following movies you should probably put this one on your list: Stranger than Fiction, Lars and the Real Girl, Juno, Bedtime Stories because there are elements of similarity in each of them.