I had a friend who used to get out of jury duty by saying "the cops wouldn't have arrested the defendant unless he was guilty". Wham bam, thank you mam, instant excusal. My wife honestly says she has religious reservations against judging anyone else since she is fallible and imperfect. She has never had to serve. I always serve when called and try my best to be impartial and judge based ONLY on the facts presented in court. It's often hard because I tend to know a little about a lot and can see things that are deliberately left out of testimony by both sides. It's really hard to set aside knowledge and rule on partial facts.