Hands down. No question. Rock Bottom. I know nothing about SpongeBob history, but there are clearly, at least, two drawing styles. The early style has less vibrant colors and pays more attention to drawing detail… also voices are clearly not well defined yet and the creators are still trying stuff out. The latter style looks like a cartoon. I dig the early style.
Rock Bottom is creepy. It’s also terribly simple with a majority of comedy taking place at a bus stop. It’s gotta be difficult to milk a bus stop for that much funny.