Well, that's the whole point of this competition - find out what each user believes to be "GOOD", which is highly subjective. People who enjoy, say, Epic Movie, White Chicks, and hate movies like Insomnia are likely to dislike Memento as well.
There is no objective "good" or "bad" for a movie - you can average the ratings given by all users, but according to IMDb, Insomnia (US version) has 7.2, and Die Hard 4 has 7.6 - which one would you prefer? (To me, Insomnia is clearly the "better" movie, but my opinion is different from that of other people... which is why the idea is to find people who have the same taste as I do and see what they consider "good").