superior colours, functions, features, prices and all good things aside, what i like about KM is that lenses and accessories are so rare. no joke. i'm no masochist, but the rarity of lenses and stuff makes it worth the "hunt" and the thrill of getting (or DIY modding!) something that is not readily available, unlike Nikon or Canon -- every shop carries a huge if not full range... boring!
photography is another hobby just like fishing, you want to go catch or go market and buy?