how do you like the portrayal of frodo?

[Elladan and Elrohir]

I don't think the weakening of Frodo had anything to do with the weakening of other characters; it was more of an across-the-board decision made by the filmmakers to go for more complexity and thus elicit more empathy from the audience.

As to which Frodo I like better, of course it's the book, as in pretty much every other area. But I like film Frodo, too. You have to accept that he is different, that he is more complex, that he deteriorates more quickly. Elijah Wood had the monumental task of portraying this Frodo, a very different one from the books, a character who could easily come across as unlikeable if not played with skill, but nonetheless the anchoring role of the cast. If I have any complaints with the film Frodo, it's with the way he was written, not with Wood's magnificent portrayal (though I do wish his voice wasn't so high-pitched).