A list - hmmm - well it would be really, really, really long. There are so many characters in the parks, at meet and greets, at shows and at character meals. Most of the time if you are looking for a photo and autograph you'd need to be at a character meal or wait on line when they have meet and greets (all different locations and times in the 4 parks - many posted in the times guides). But waiting to get all the autographs and photos that you want might take alot of time away from other things you could be doing. Maybe you and DS could make a list of your top 10 or 15 favorite characters and then see if you can find all of them during your trip. Some characters (like Mickey and Minnie) appear in many places while others (like Woody and Jessie) are a bit harder to find. There is some variety in the characters you'll find at each of the 4 parks so for maximum character encounter be sure to visit each park.