You cursed brat! Look what you've done! I'm melting! melting! Oh, what a world! What a world! Who would have thought a good little girl like you could destroy my beautiful wickedness? Oooooh, look out! I'm going! Oooooh! Ooooooh!

You have no power here! Begone, before somebody drops a house on you, too!

Dorothy: You get out of here, or I'll bite you myself! You wicked old witch!

"Oh, the smell of sulfur!" Glinda, after the witch departs Munchkinland.

If I ever go searching for my hearts desire again, I won't look any further than my own backyard. Because if it isn't there, I never really lost it to begin with.

The Doorman: The Wizard? You can't see the Wizard! Nobody's sees the Wizard! Even I'VE never seen the Wizard!
Dorothy: Then how do you know there is one?

When the Tin Man asks the Wizard for a heart,
WIZARD: You don't know how lucky you are, not to have one.
TIN MAN: But I still want one.
WIZARD: "Hearts will not be practical, until they can be made unbreakable."
I love that!

The dialogue between Uncle Henry and Miss Gulch!
MISS GULCH: Mr. Gale, I want to see you and your wife right away about Dorothy!
UNCLE HENRY: Dorothy? Well, what has Dorothy done?
MISS GULCH: What's she done? I'm all but lame from the bite on my leg!
UNCLE HENRY: You mean she bit ya?
MISS GULCH: No. Her dog!
UNCLE HENRY: Oh! She bit her dog, eh?
MISS GULCH: NO!

"Witch? Huh, I'm not afraid of a witch. I'm not afraid of anything. Except a lighted match."

Was your mom on the yearbook staff or something?
I did sixty in five minutes once

I was going to use "Some people without brains do an awful lot of talking" for my yearbook quote, but my Mom wouldn't let me.
Just watched my first episode of Dukes of Hazzard - Down with censorship!

One I use in my everyday life, jokingly, when I make a suggestion:
"Of course, I'm not bright about doing things"
"Are you hinting my apples aren't what they ought to be?" -
The Wizard of Oz, 1939

You have no power here! Begone, before somebody drops a house on you, too!

Ain't it the truth. Ain't it the truth!
The Cowardly Lion!
And the post just above mine!
There are some people with no brain that do an awful lot of talking.
I intend to live forever.
So far, so good.

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Definitely my favorite line as well. And it mirrors my favorite line from my absolute favorite film of all time, Return to Oz.
http://www.imdb.com/board/10089908/?ref_=nv_sr_1
Tik-Tok's brains have run down and he's speaking gibberish. Jack Pumpkinhead asks Dorothy,
"If his brains ran down, then how can he still talk?"
and Dorothy replies,
"It happens to people all the time Jack!"
Which it does
We've met before, haven't we?

Dorothy: If you don't have any brains, then how can you talk?
Scarecrow: Some people without brains do an awful lot of talking, don't they?

Yes, great line!
I love Auntie Em throwin' shade at Miss Gulch.

My favorite too.
Milo, I've told you again and again - please, don't walk on the chickens!

From the Tin Man: Now I know I've Got a Heart, cause its breaking. It gets my tears rolling. Love the Tin Man.

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Oh Auntie Em Theres no place like home
Toto too? Toto too

My favorite is from Zeke (to a pig): "Get in there before I make a dime bank outta you".