I've gotten Cameos from both Andy Karl and Jenn Colella, both of whom were extremely warm and personable.
I also got my fiance a Cameo from Greg Baldwin, a voice actor known for his work in Avatar: The Last Airbender. He did the cameo in character, and it was wonderful to send my fiance some wisdom straight from the voice of one of his favorite fictional characters.
Also, re: Susan Egan, she was extremely sweet when I met her after a Broadway Princess Party. I asked her to sign a Hercules picture for me, and then she also signed and personalized something from Steven Universe for my friend who was going through a hard time.