The book unChristian by David Kinnaman and Gabe Lyons is a fascinating read. In it the authors outline several perceptions of Christianity (and Christians) by younger generations.
The book really opens the eyes of believers (if the believers will open their hearts and minds to the facts) to the "image problem" that Christianity has in the present generation. Of course, some are going to ask, "Why should we care what they think?" My answer to that would be, "Because we're trying to reach them."
And to reach unbelievers with the Gospel of Christ, we're going to have to know where we appear to be (or are actually) unChristian! Reaching people for Christ is like fishing - you have to begin where THEY are, not where you are (or where you think they are).
If you are serious about reaching this new generation, this book is a must!