Well, I choose Pentax, and there is no going back. There is no perfect camera, and if I can't do it with what I have, then I can't do it - think the problem through and find another approach that will work with what I have. Too expensive to change, and I have learned from experience, that when you change - you just exchange one set of problems for another.
Not a professional, so its not a matter of putting food on the table. For me, its about taking pictures, not acquiring the equipment (apparently the thrill of the chase). I have saved and acquired over time, what I think I need. I can't fathom how folks can change all the time.