I wasn’t given a choice to select a reward when I completed the challenge. There wasn’t even an indication of a reward, aside from the ticket.
Once you have completed the challenge, you will be given the option to choose one of the following Family Guy Online prizes:
• Family Guy character of your choice (Peter, Lois, Stewie, Chris, or Meg)
• Chat icon that appears next to users’ avatar in chatrooms
• Trophy that will live on users’ profile page indefinitely
• Profile page skin