It would be cool to see if there are any other users that have the same 'Favourite' movies as me. From one match to all 4.
I think having 4 out 4 favourite movies the same as someone else would be cool to see as you obviously have similar taste. This could also improve the social side of the app too.
It might also be cool to see some stats in common on users a profile, such as how many movies you have both watched, rated, reviewed.
You have 50 movies in common!
You have 35 movies with the same rating!
You have both reviewed these 9 movies!
Then from there maybe you could do friend suggestions based on these stats.