Naturally, it’s Ankylosaurus. Just look at this armoured tactical turtle and tell me you do not love this silly little guy!
Just wanting to eat his plants. Wanna gnaw on him? Tough luck, it hurts and you cannot crack that shell. Also, he will fucking break your kneecaps with his built-in hammer while you’re bothering him.
Spirit animal.
Any of the Hadrosauridae. Probably Lambeosaurus, specifically for the cover to one of the Dinotopia paperbacks:
More recently it has been determined that hadrosaur likely walked most frequently on all fours, with a larger tail. Still amazing looking creatures (credit to Gabriel Ugueto for the art):