DS loved the characters at 6 months. The CP - with Pooh, Tigger, etc. was his favorite. He just laughed and laughed while interacting with Eeyore and Pooh.
DS enjoyed the characters again at 8 months, but at 13 months, he was scared of the "plush" type characters (our soultion was that I held him in the pics, and stood between him and the characters, the bit of distance helped). He did love the Princesses. at 13 months Now, at almost 3, he loves them all and will run up on his own for pictures.