I hope whoever picked Elijah Wood for Frodo, and Agent Smith for Elrond isn't used to cast the Hobbit. Elijah Wood as a whiny, teary-eyed Frodo annoyed me to no end. I swear, Peter Jackson's stage direction for every scene with Elijah Wood was, "Okay! Slowly turn into the camera and cry!" A stage direction he apparently repeated over and over in King Kong with Naomi Watts' character - another movie I abhorred.
Don't get me wrong, I thought the rest of the casting was near-perfect, though the directing for Gimli had me almost in tears. In the books, Gimli was a noble and sure-footed dwarf whose axe-wielding prestige was unparalleled. In the movie, he was a bumbling idiot who couldn't cut down a shrub with his axe.