Classic Warner Bros.:
-- The early Daffy Duck cartoon in which Daffy, for no apparent reason, starts leaping around the wetlands singing, "The Merry Go Round Broke Down"
-- The Wile E. Coyote cartoon with all the malfunctioning catapults.
-- Duck Twacy, Private Eye.
-- DUCK DODGERS in the 24th and a half CENTURY! "But why would you want to blow up the Earth?" "Because it obstructs my view of Venus, of course."
-- "Kill da waaaaabit!"
-- "Duck season!" "Wabbit season!" "Duck season!" "Wabbit season!" "Wabbit season!" "Duck season!" "Wabbit season!" "Duck season!" "Wabbit season!" "I say it's DUCK SEASON! Shoot me NOW!"
-- Michigan T. Frog: "Come on, my baby, come on, my darling, come on my ragtime gaaaaal!"
Classic Disney:
-- Any time Donald Duck loses his cool. Which is, um, every time. Seriously, he's like a 24th-level duck barbarian.
-- Chip 'n' Dale vs. Donald Duck.
-- Scrooge McDuck, on money: "I like to swim in it like a dolphin, burrow in it like a gopher, and throw it into the air and let it hit me on my head!"
-- Mickey Mouse vs. the Mad Doctor. That guy was actually geniunely scary.
-- Anything with Bad Pete/Pegleg Pete/Pistol Pete/Black Pete/Pete.
-- Anything with Professor Ludwig Von Drake (funny how ducks consistently beat out other animals on the coolness scale).
-- Humphrey the Bear.
-- Goofy's "how to" cartoons.
Who Framed Roger Rabbit:
-- Deuling ducks!
-- "I'm not bad... I'm just drawn that way."
Animated DCU:
-- Batman: Mask of the Phantasm. The whole thing.
-- "Mad Love". Harley Quinn rocked. After a while, I got a little too much of her, but she's still okay in my book.
-- The Mad Hatter.
-- Two-Face.
-- I'm surprised no one mentioned "Mxyzpxlated". That has got to be the funniest episode Superman ever did.
-- In the same vein, "Little Big Head Man".
-- The Toyman. This guy was so creepy... he really belonged in Batman's rogues gallery, not Superman's.
-- "In Brightest Day..." Kyle Rayner is no Hal Jordan (and definately no Alan Scott), but I loved this episode, anyway.
-- "Legends".
-- "The Savage Time". I thought this was a masterful episode. Sergeant Rock and the boys of Easy Company especially stood out for me, as well as Wonder Woman and Steve Trevor.
-- Superman putting a stop to Gorilla Grodd at the end of "Secret Society".
-- The beginning of "Hereafter". The fight between the Justice League and Metallo, Kalibak, Livewire, Toyman, and Weather Wizard is one of the most awe-inspiring animated fight scenes I have ever seen.
-- Booster Gold's chat with Ralph "The Elongated Man" Dibny in "The Greatest Story Never Told". "'We don't need two stretchy guys'." // "Once, I disguised myself as a vase for three days!" "No you didn't." "Well, no, but who'd want to anyway?" // "The squeaky wheel, my friend, the squeaky wheel..."
And even though it's not animation in the sense we're all talking about, I feel obligated to mention...
-- "TROGDOR!!!"