My top 10 favorites! (In no particular order)
1. "This guy's so RICH, he's got a swimming pool- in his swimming pool!" -Chocolate With Nuts
2. "I don't know why, but I think I'll kick SpongeBob's butt tomorrow!" -The Great Snail Race
3. "I wrote down everything I HEARD!?!?!" -Suction Cup Symphony
4. "What are you doing cramped up in here when the weather outside is so... normal!" -Not Normal
5. "No one messes with me thermostat!" -Krabs a la Mode
6. "No, let's save that for when we're selling Real Estate..." -Chocolate With Nuts
7. "No! Please! I've got a wife and kids!" -Squilliam Returns
8. "Is it time already to ruin Squidward's day?" -Home Sweet Pineapple
9. "I WENT TO COLLEGE!!!!!" -many episodes of which Plankton was in
10. "Potato chips are every mailman's weakness!" -Boating Buddies