Because you like Pinkie Pie in My Little Pony
The last war left his economy devastated, and now Germany is engaged in another war and stuck with two barely trained allies for help. See them in Axis Powers Hetalia.
Patrick Star enjoys life's simple pleasures because he can't wrap his brain around anything more complicated. See them in SpongeBob SquarePants.
A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.
Luis is a deliverer of silver linings and long-winded stories. See them in Marvel Cinematic Universe.
Scooby-Doo always keeps his priorities in order: eat snacks first, solve mysteries later. See them in Scooby-Doo.
Despite the dissolution of his state, Prussia hangs on – mooching off his younger brother Germany and reading comics. See them in Axis Powers Hetalia.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Disgust is a friend who makes sure you stay away from all things gross. See them in Inside Out.