On of the most frequent questions that gets asked in the Walt Disney World for Grown-ups member forums usually goes along the lines of "Who do I need to tip on my Walt Disney World Vacation?" Tipping is a highly personal choice, and you should never be required to leave a tip, especially when you experience poor service, but it is the custom in the US to leave a tip for certain service providers. We've gathered together a few tips on tipping to answer your questions.