Here's a couple more I remembered:
From the episode about The Slaughterhouse (also on my Top 10 list):
Homer: So I told the nurse, you can take your free Tetanus and shove it.
His jaw locks as he finishes his sentence. He takes a fork and pries it back open.
Marge: But you still haven't told us why Lenny bit you.
From the episode where the Simpsons go to Floria (again, it's on my Top 10 list
):
Homer's afraid that he's going to die after he takes a lifestyle quiz in a magazine that says he's only going to live for 3 more years. He's sitting in front of the television watching Charlie Rose interview producer Robert Evans:
Homer: Can't sleep -- gonna die. Can't sleep -- gonna die.
Rose: We're back with legendary producer Robert Evans. Now, before you did "The Godfather," there was "Love Story." tell us about that.
Evans: Ah, "Love Story" -- the little picture that could. Was Paramount chomping at the bit to make it. Heh heh, you better believe they weren't. But once that tear-jerker hit John Q. Popcorn, it was boffo-boo-boo box office all the way.
Rose: And the critics loved it, too. I remember Vincent Canby said,
[looks straight at Homer] "I'm going to kill you, Homer. You are so dead."
Homer screams.
Rose: Now "Chinatown" was a classic, but you had problems with the sequel, "The Two Jakes?"
Evans: Oh, boy. Disappointed? I had the blues like Chasen's had chili. I said to myself, "Evans, you forgot Hollywood rule number 1:
[he looks straight at Homer again]: Kill Homer Simpson."
Of course, the part where he goes to see the plant psychiatrist is just hysterical too.
Psychiatrist: You hate your father don't you?
Homer: Kinda, but the man I really hate is your father.
Psychiatrist: I'm sorry, I shouldn't have said that. I was just venting. I think your fear of death is causing your insomnia which is causing your erratic behavior.
Homer holds up a plastic baby doll that's missing an arm.
Homer: Then why isn't my baby gaining any weight.
Psychiatrist: Because it's made of plastic.
Homer: I see.
Psychiatrist: What you need is a good long rest. I suggest Florida.
Homer: Florida? But that's America's wang!
Psychiatrist: They prefer the sunshine state.
Nick