Here is a great article talking about the differences between RT & Metacritic:
http://www.thecroakingfrog.com/blog/rotten-tomatoes-vs-metac...
I personally find that there are less misfires on a good Metacritic score.
Re:Be Suspicious of Online Movie Ratings
by chrismcb on Friday October 16, 2015 @02:32PM
(#10401219)
I think you are the one that is misinterpreting the percentage. 95% means that 95% of the reviews were "positive." Of course it says nothing on whether you will like it or not, because it has no idea what you would like.
Something to bear in mind is that a slight above mediocre film can have a 100% rating if it has wide appeal.