At Disneyworld, characters are like Rockstars.
Whenever characters appear in one of the parks, a line of families waiting for autographs and photos immediately forms. There is always a character handler who cuts off the line at a certain time and then whisks the characters away.
Character SuppliesYou need an autograph book, pen and camera. If you don't already have them, you can purchase an autograph book and pen as soon as you enter a Disney Park. If you forget your camera, buy a disposible.
Some characters, like Buzz Lightyear and Mr. Incredible, have giant hands and can not sign autographs. Don't worry, they keep a stamp close by.
Where are the Characters?In addition to random character appearences throughout the parks, Magic Kingdom has an area where you can always meet a few characters, including Mickey.
Epcot is the lamest park for Characters. Magic Kingdom has the most characters, but there are also quite a few at Animal Kingdom and MGM.
Character MealsMany families book at least one "Character Meal" while at Disney World for even more characters. You get a good meal and then many characters come by your table.

The most popular character meal is Princess breakfast or dinner in Cinderella Castle. This books months in advance, so we did Princess dinner at the resteraunt in Norway in Epcot.
Norway had good entrees, and an all you can eat bar of cold salads, meats, cheeses and fish.
Character meals are expensive. For 4 of us it was well over $100. I had two draft beers at $6,75 a pop.
As we were leaving the table I still had a half a beer. I stood up and finished the beer, and as I did, I was drinking beer as expensively as you pump gas.
I imagined I could see the money being spent like at a gas pump, as the level of beer went down in the glass.