What is the best thing someone ever did for you?
What is the best thing someone has ever done for you?
What is the best thing you have ever done for somebody? What is the best thing you have ever done for others? What is the best thing you have ever done? What's the best thing you've ever done? What's the best thing you've ever done? What's the nicest thing you have ever done for anyone? What is the best thing you have done? What is the best thing you ever done in your life? What is the best thing you have done for yourself? What is the nicest thing you, personally, have ever done for another person? What is the nicest thing you ever did for someone? What's the kindest thing you've ever done for anyone? Which is the best thing you have done in your life? What is the kindest thing you have ever done for anyone, be it friends, family, or strangers? What is the best thing you believe you have done for yourself or others in your life so far? What is the most interesting thing you have ever done? What is the most important thing you have ever had? What is the most satisfying thing you have done in your life? What is the most incredible thing you've ever done in your life? What is the nicest thing you've ever done? What was the kindest thing you have ever done to someone? What is the biggest thing you have done in your life? What is the meanest thing you have ever done to a person? What is the most soul satisfying thing you have ever done in your life? What is the best thing a person can do in his/her life? What is the nicest thing you have ever done for someone on Christmas? What is the most amazing thing have you done with your life? What is the best thing that ever happened to you because you worked hard? What is the hardest thing you have ever done? What is the sweetest thing your pet has ever done for/to you?