Allow for 4 or 5 star ranking system.
Instead of "like" "Dislike" or leaving it blank, I wouldn't mind a system that allows me to rate a movie after I watched it. It would also be interesting to see what movie has the highest "star" and lowest "star" rating.

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Carolina Freitas commented
I like ICM because it keeps it simple. Imdb already does that. And everyone who uses ICM necessarialy uses IMDB.
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Carolina Freitas commented
I agree with anonymous, that's why imdb is for. I wouldn't have the patience to vote in two different sites the same movie.
That's why ichecklists is good you only check/import and say what's is favorite.
Another option is to show the grade on imdb, or personal grade if the person chooses to make it public. -
Anonymous commented
This is what IMDB is for.