There is so much discussion about the M8 not being the megapixels of Canikon's, not having the clean higher iso's, no full frame, etc. One point I almost never hear is what the camera is all about - I ride motorcycles; one can purchase a Ducati. An Italian bike with much cache, great looks and a tradition of racing wins. They are coveted by collectors, desired by those who can't afford them and looked at as an icon of motorcycles. Or one could purchase a Japanese bike (Suzuki, Yahama, etc.). It has more horsepower, gas milage is better, they are readily available and highly discounted. It will almost never break down, parts are cheap and will beat the Ducati in almost any performance test, reliability test or otherwise. (and let's not even get into the cost of maintaining a Ducati! My 6K service was almost $1000!)
So why would anybody buy a Ducati? The same reason somebody will buy a M8 over a 5D. You know, going into it, the lenses are horrendously expensive, you have the use IR/UV filters, higher ISO noise, inaccurate frame lines, etc. Simply put, if the quirks and known problems detract from your ownership experience, and you crave the reliability and better performance of a Japanese camera, the M8 is not for you.
Personally, I have an M8 and a 5D. Horses for courses. But I read post after post berating Leica for not making a Japanese like camera. What's the point? It is what it is. Use it for what it's strengths are or sell it and buy something that will make you happy.