One of the reasons I love football is how complicated and simple it is at the same time.
On one hand, each and every play has multiple matchups and assignments to watch on both offense and defense. The complexity of schemes is dizzying, and it truly is well above my head (as well as about 99% of the regular NFL viewers' heads) what exactly is going on out there.
On there other hand, there's a certain simple rule of the game that will never, ever go away; if you can beat the guy in front of you, good things are going to happen.