"[Being judge] is about being honest and giving everybody a fair shot and telling them what you think. Sometimes it's good and sometimes it isn't. It's more important to be honest than say things to make people feel better. I don't think you have to be rude, but I think you have to be honest. But I think it's really important to be specific: Here's what you did that was great and why. And here's what you did that wasn't great and why."