Soooo true. And then you start reading and it is like opening Pandora's box and a box of your favorite chocolates all mixed together, except everything looks the same and you don't know what is going to choke you or delight you.
It took me years of RpG to wrap my head around, and countless hours on this forum to get the essence of what the authors thought of the game and what kind of games (plural intended) I could run. I would love to avoid that to new comers and I will write my own "How to Ars for newbie". It will only be my side and personal view (as based on this forum, it is clear that reaching consensus will be likely impossible), but it will be a start. And if a few others bring their own perspective, that will help.