I think I answered a simalr thread to this, but Imma list my favorites here anyways!
1.) Ruby. She's too precious for this world.
2.) Chomper. Come on, he's a trex but cute!
3.) Littlefoot. He has a kind heart, and doesn't give up on fixing problems.
4.) Cera. She can be funny sometimes.
5.) Petrie. I honestly don't know, I just love skiddish and nervous characters.
6.) Ducky. She's a little annoying sometimes, but she's sweet. yep yep yep!
7.) Spike. If I could just list my favorite characters from the franchise, he wouldn't even be on the list. I don't hate Spike, he's just kinda stands there and eats food...wish they'd make him talk, or give subtitles to his grunting noises.