I have enjoyed the Samsung NX series a lot. Especially the NX10 and NX200. Somehow I just couldn't get over the large Samsung brand name on my cameras. Off course this is snobbish rubbish, I know. Personally I just feel more comfortable with a real photography brand on my camera. I almost feel ashamed i just wrote this, but this is my opinion. I'm not a CaNikon guy, but in the end I feel more comfortable with my Pentax and Fuji cameras.
The essence of the Pentax Q system is not about the sensor or pixel peeping. It's a tiny (but very serious) camera with wonderful controls and a great menu system. The real joy of Q is holding it and using it. Much more fun than several other cameras with a great sensor but awful user experience. The Q is a rare breed, almost everyone ho has one loves it.