Rotten Tomatoes is good and predicting a movie I (or others) like, but not really at "ranking". Zootopia, one of their top movies of 2016 and a 98% rating, is a good movie, but one I'm unlikely to pursue again. The Godfather (with a 99%) rating, is a movie I will pick up on Blu Ray and revisit many times. It's far more than 1% better than Zootopia.

So RT is good at predicting "should I watch this movie I haven't watched before", but bad at predicting more sophisticated habits or preferences. I wouldn't buy the Blu Ray off a RT prediction, but I would rent.

So it becomes a question of what are you trying to accomplish? For some issues up/down is a good way to solve a problem, for others it isn't.

In my experience, my favorite movies I find via glowing reviews. Rotten tomato completely obscures this view: if all the reviewers kind of like it, it'll get 100%, whereas polarizing films always suffer. I'll take "kids" over "star wars" any day for a better movie. Why? I'm gonna see star wars because i want to, not because I expect a meaningful aesthetic. But Rotten Tomatoes takes the opposite tact, pushing me towards crowd favorites rather than what i might rate highly.

Really this comes down to how terrible one dimensional comparisons are: it only measure popularity, which is a terrible filter for quality.

I used to religiously research movies on RT - with a lot of success in my mind. With the user rating, the critic rating, and the "top" critic rating, you can infer a surprising amount about who is going to like any given film, and you learn over time where you fall on the critic/top critic/audience graph.

Recently, however, it seems like more (imo undeserving) movies that are "just ok" - like decent, but nothing special, romantic comedies and big blockbusters - are scoring above 90%. I might be being curmudgeonly about it, but I've nearly stopped checking it because it feels like there's no information there. My theory is that this started happening once Roger Ebert died... without such a leader in the field, no one is willing to say they didn't like a film unless it's obviously very bad.

For things like books, I also find that reading the middling reviews often gives the best S/N ratio. It weeds out the fanboys and weeds out those who were clearly not the audience for the book (or just have some ax to grind). You're more likely to get the "I really love this author in general but I didn't care for this book because 1.) 2.) 3.)."

Agreed. For products in Amazon above a certain star threshold (say, 3+), I evaluate given the shape of the review histogram, particularly minimizing the size of the bump down at 1-star and 2-star.