I got a lot of good points to use from the other thread and used a few in Disney last month. DH looked at me with the "I don't know you" look, but even he eventually caved in and started interacting. He loved it once he started.
In Epcot, we got to see Figment. Epcot was our first day in any of the Disney Parks, and I told Figment that he is our DS's very first autograph. Well, Figment then "stamped" our DS's book 4 times.
The first two characters we saw at MK were from Pinochio (I'm not up to speed on Pinochio, so I forgot the character names). I just remember they weren't the good influences for Pinochio and started leading him down the wrong path (so-to-speak). Anyway, I asked them if they had seen Pinochio yet. They stopped and put their hands by there forehead looking for him. The CM said they were trying to come up with a strategy to find him.
Buzz Lightyear: We did Ranger Spin in Tomorrowland and came out to find Buzz at CoP signing (stamping) autographs, so we got in line. When it was our DS4's turn, we told Buzz that DS got "Ranger First Class" with his fight against Zurg. Buzz gave him a "thumbs up".
In MGM, we had a character breakfast (Play N Dine) with JoJo and Little Einsteins. Well, prior to JoJo airing on Playhouse Disney, our DS's daycare gave him the nick-name JoJo. When we met JoJo, I told her about his nickname from daycare. She was so excited and signed his book "To JoJo, love & Popcorn, love JoJo.
I really thought that our DS would be very shy around the characters at first (he usually is at home when he attends birthday parties), but that wasn't the case at all. He went to each one and had a smile from ear to ear with a very "proud" look on his face with each one!