I liked Monsters a lot (beautiful ending!), but it's a whole different sort of film.
A lot lies in the monster's design. I know Toho is very picky about it, if their blessing is needed here, that is.
I agree with Darabont, the shift from threat to protector is somewhat awkward, apparently he is going or the former.
I only enjoyed Emmerich's film on first viewing. It instantly fell apart during repeated viewings...