Basically, if you can’t make great photographs with any of these cameras, is is not the fault of the camera. There are, however, certain advantages to the Pentax K3, which I find compelling:
* it just feels great in your hand – elegant and ergonomic
* the lenses, particularly the limiteds, are rugged and indisputably top-of-the-line
* the K3 body may be slightly heavier than some, but remember, is it waterproof (well, protected) and rugged; furthermore, the compact and lighter lenses compensate for the body
* the lenses tend to be much smaller than those of other makers, so if a light and unobtrusive package is of value to you, advantage Pentax
* the weatherproofing is superb, and note that many of the lenses are equally weatherproof
There is likely no reason to switch to a Pentax if you are happy with what you already have. But if you are starting out or are simply fed up with the huge, bulky DSLRs with gigantic lenses, I would highly recommend a Pentax K3.

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.