I don't know, with any certainty, exactly what the 5SKs are. I do have an idea what they might be, but I never bothered to look them up. However, I am going to assume that anyone who plays most of their rounds in 80s has at leas 2, or 3 of the 5 keys, rather they know them or not.
As for enjoying the game, I could shoot a 100 and still enjoy playing just as much as when I break 80. Everytime I go out to play, I can usually find myself with a shot that is new to me. I meet new folks, some of which are pretty interesting people. When I play, I am the offense, and Ma Nature, and the course itself are the defense. If I hit my own personal par of 80, then I gained a draw. More than 80 and I lost. When I break 80 then I got a few over on the defence. I have even played against the course (and weather) using a match play format. I usually lose, but it's fun.