IMDB

The greatest site around for movie facts and reviews is www.imdb.com.
Roger Ebert is usually right on the money as an external reviewer. I had
pegged this site many years ago before it went commercial and Roger was way
down the list but over time I learned that his reviews were very close to my
own tastes. He is appears to rate based on Film quality (in relation to the
whole package like acting, sound, editing, etc) and originality of ideas so
he will rate a whole range of genre on this basis rather than his preference
of subject or audience.
I think my tastes are similarly classed - normally I will prefer a movie
that makes me think and has some original ideas. I would also prefer that it
is well filmed and produced although in some cases this is not mandatory
e.g. Blair Witch is a good example where the amature nature of the
productiton added to the effect realism. Blair Witch's appeal was it's
originality and it broke established film making rules or invented new ones.