IMO 1.4 is the way to go, entirely because of the color grading.
As CatBus said, it’s entirely down to personal preference, especially once you get to 1.3 or higher - as far as I remember, v1.3, v1.4, and v1.6 all are essentially identical except for different approaches to color grading. I happen to think v1.4 looks the most authentic and natural, while v1.6 looks too desaturated and drab.