If I am playing against another person I will use the over/under method and count everything as a par 3 just for simplicity sake. Obviously, no matter what we call them as long as we all use the same standard it makes for quick and easy score comparison. When I play by myself, I count strokes because the over/under is useless. I also survey the course and decide if any of the pars are 2, 3, 4, etc. If a hole is easily 2-able, I like to note that in the total par for the course as it helps you know what you need to work on for a particular course. Often times I will go back to that hole when I am on the course and throw it a bunch of times or even play it or survey it backwards just to get a good picture of where the ideal spot to approach from would be. This has proven to be very useful and can quickly give you a "local" advantage over other players on any course you have easy access to.