A number of posters believe that ego is the only reason to buy a Leica M. In many cases, ego prompts the acquisition. In other cases, it's not ego, it's someone believing that Leica is the best camera and, thus, it will take great pictures, regardless of the skills of the photographer.
But, in a great many cases, Leica is the perfect camera for the task. I've never used Leica digital cameras, but Leica M film cameras definitely have a serious photographic purpose: They are quiet cameras, unassuming in looks and capable of wonderful available light and candid photography.
I took my Leica M's with me on my trips to Cuba. They were the perfect cameras for the street photography I did, often in very dimly lit places. They don't look like pro cameras and they do not intimidate subjects.
So, for those of you who assume that ego is what Leica is all about, I suggest you think twice. The camera is a serious instrument and has a definite, even unique, purpose.