* Plankton: He's constantly trying to steal the Krabby Patty formula, which SpongeBob takes very personally.
* Getting fired: SpongeBob loves his job at the Krusty Krab and gets incredibly upset when he's fired, even if it's just for a short time.
* Being called "a kid": Though he's a sponge, SpongeBob takes offense to being called a kid.
* Having his bubble blown: He's very protective of his bubble and gets frustrated when it's popped.
* Not getting his way: SpongeBob can be somewhat stubborn and doesn't always handle frustration well.
While he's generally a happy and optimistic character, SpongeBob's strong emotions and convictions sometimes lead to him disliking certain things intensely.