Not sure if this idea has been posted yet, but I couldn't find anything similar to it so here we go:
What I would really love to see is a button that will give you a random movie, tv series or anime (depending on what you'd like to get) to watch, pretty much like a roulette. I have a lot of stuff to watch on my Plan to Watch list and yet I have trouble picking the next movie or tv series to watch. This would greatly help and add a little bit fun to it.
Random button is available in all lists and discovery in V2 Beta.