Buck because he was crazy! I don't think the other characters were very good in this movie. Only Sid and Ellie seemed to be in character. Manny wasn't his moody self (probably the pregnancy. Diego was still too soft, and there weren't much conversations between him and Sid. Crash and Eddie weren't very mischievous.
Wow, tough question! My प्रिय new character has got to be Buck in the third movie. But as a whole the herd should be counted as a character because everybody had something to do this time around. The possum twins got outrageoused out done द्वारा the dino triplets and Buck of course.