I caught this list of telltale signs over at De-conversion:  Resources for Skeptical, De-converting or Former Christians.  Here are a few items from the list:

• You see nothing wrong with stating “facts” about what God thinks as if you are His personal secretary.
• You complain about Christians not being allowed to practice their religion in foreign countries, yet when someone tries to set up a Hindu temple/Mosque/Pagan or new age bookshop in your town you go ballistic and think it shouldn’t be allowed.
• Your typical prayer uses the phrase “Lord Jesus” or “Lord God” more times than the Bible.
• God regularly opens up convenient parking spaces, JUST FOR YOU.
• You think people who enjoy science fiction and fantasy, especially those who enjoy the Harry Potter novels, are going to be in hell.
• You think that being tortured for all of eternity for any reason is an appropriate punishment.