One of the big things for me is Louie's speech to the untamed Rex. It must be the most touching speech ever written that uses words such as "stiff" and "yahoos".
I think Elsa had the best lines. I liked when they were first flying over NY and she said "It's a world covered in jewels." And when she said "The way you look at me, it makes me want to lay an egg."
When the Nostalgia critic says "Well thankyou for that pointless detour, movie. If one of the characters gets a splinter in his foot and manages to wiggle it out, please show me that aswell."