I still prefer FSX/FSX-SE, because I like the start screen, and menu better, and both work very well in Windows 7, my preferred operating system. FSX-SE is quite an improvement over FSX, as it certainly seem to perform better than FSX. Once I spend more time with these in Windows 10, I will see if P3Dv4 (which I decided to install in Windows 10) is the one I will spend more time in, if FSX/FSX-SE don't perform well enough.

Note. Too bad I didn't know it was a multiple choice pole, as I submitted my choice before I clicked on the view topic  button, or I would have selected P3D v4 as well. Perhaps having that displayed on the main forum page might stop others from making the same mistake I did? :-/