Uninteresting or mediocre might be more appropriate. I love finding new media through hearing about other peoples suggestions, hearing the tenth or twentieth recommendation of Pi, Fight Club or Requiem for a Dream is just totally boring and not useful. Is an exercise in un-surprise.
Parent is not talking about the quality of the recommendations, but the taste of the people who like those movies.
If I recommend you Fight Club, the recommendation would be of poor quality because everybody has seen/likes this particular movie already, but does that have to mean the movie itself is bad too, just because it is "common" ?
