[Morthoron]

I think Elijah, more so than the other Hobbit actors, actually looked like Frodo, or at least my perception of Frodo; whereas, Sean Astin neither looked nor acted like Samwise at all (the most egregious casting error in my book).

Now, just because E. Wood looked like Frodo, does not mean he acted the part. Like Elrond in the movie, Frodo was far too whiney and effeminate. How Frodo managed to get from the Shire all the way to Mordor in one long unrestrained whine seems remarkable. I would have killed him myself right around Bree. But we do get brief snatches of Frodo every once in a while, particularly when Wood is not consciously acting the part. When Wood does not emote, he is fine, but the minute P. Jackson asked for fear or anguish or anger or sadness, Wood offers the same expression of a six year-old girl who fell off her bike and skinned her knee.