I also say that line on the regular, always gets a chuckle.

Professor Farnsworth: “Ah, perfect timing! I just turbo-charged the ship’s matter compressor!”

Fry: “What’s the matter compressor?”

Professor Farnsworth: “Nothing’s the matter, Fry, now that I’ve turbo-charged the matter compressor.”

Always cracks me up.

Good human.

Don’t you worry about blank, let me worry about blank.

Lust for gold? Power? Or were you just born with a heart full of neutrality?

I’m pretty sure this gag is from when Fry joins the police, but it always cracks me up.

The same episode he also mentions having a lot of paperless work to do. Not a background gag but a great line nonetheless.