It’s like I said about knowing the tastes and likes, which you can also do if you follow a certain critic. Rotten Tomatoes to me is a blunt tool as part of the decision making process, I haven’t found it’s wrong very often at the top and bottom of the scores. Like my son wanted to see The Emoji movie as a trailer came on TV, RT gives it 8%, it’s almost certainly shit, then I listen to the BBC film show and the critics and listeners also say it’s shit, so that’s an easy decision.
The more ‘lukewarm’ responses are the more difficult it can be, especially on films that are bold and divisive. I won’t mention the P word but say something like Speed Racer which a lot of people love and a lot don’t like at all. That’s when I find MW comes in very handy because I know the types of things people like and how they overlap with mine.