I can't believe nobody mentioned this, but my two all-time favorites are Fresh Hare and The Wabbit Who Came to Supper. My favorite scene in the former involves a chase scene under the snow, with Bugs Bunny buzzing along and Elmer Fudd going VROOM! like a car motor. The chase ends when Elmer crashes into a tree, which reveals decorations, and then, with Jingle Bells playing in the background, Bugs pops up shortly afterwards and says "Merry Christmas, Santy!" because of Elmer's canny resemblance to the jolly old man himself. In the latter, my three favorite scenes are Bugs singing in the shower, Bugs wishing Elmer a "Happy New Year!" and singing Auld Lang Syne before Elmer realizes it is actually July 4, and the final scene with the postman saying "Easter Greetings!" before handing Elmer a large egg with a hundred wascally wabbits inside; the hares pop out and say Bugs' signature tagline in unison: "Eh, what's up, Doc?" before jumping out of the egg and running all over his property. Hilarious stuff, and I wish I had posted this during the holiday season that had just gone by. Oh well...