FilmAffinity is awesome for that - basically, after you vote a bunch of movies, it finds the N active users that voted most similarly, and then it offers you as recommendation whatever those people vote favorably that you haven't seen yet. You can actually see those selected people and filter them manually too.

The consequence is that you don't care about things like masses of teenage girls upvoting the latest vampire fad, people downvoting a classic because they don't understand the context or anything, because only your bubble matters to you. And if you fear that the bubble will keep you from discovering new things, there's a way to set up the algorithm to calculate your similar users so that they aren't exactly close to you - or you can go to a specific users profile if you know them and see what they're voting.

I find it amazing compared to IMDb or rottentomatoes, but for some reason I think it's mostly unknown outside of the Spanish speaking world.