I loved the parts in the movie where he skates with the pengunins and also when he turns his apartment a home for the penguins with ice everywhere and also his apartment looks cool with the snow in it too!
My favorite joke in the whole movie is when Popper said that the zoo will be all nice and it's narrated by Morgan Freeman. It's well written that way because Freeman not only played God in Bruce Almighty but also narrated the documentary March of the Penguins.