Just watched PK. I feel like this movie lacks something. I will rate this movie as an average time-pass movie.

Aliens with the technology of flying saucer and doing inter-stellar travel will also have the technology to detect the level of human civilization. Why would such an advanced civilization would choose planet Earth to visit as if they have nothing else to do? Also, an alien who can read your mind can also locate where his locket was taken after being stolen but Amir has to do lot of work just to find his locket which doesn't seem fit in this context because Amir belonged to a superior civilization with super-sensory power of mind.

Something doesn't fit in this movie!