Well this is a tough one. I loved football when it was like this, but if you say that then you're deemed a macho caveman who doesn't care about injuries etc. For me it's more about what the game is becoming - a glorified version of arena league where everything is geared to points being scored. The NFL must be pissed that offences are struggling this year. Although a lot of the time that's because of sloppy offensive play rather than brilliantly executed defense.
I remember watching the 49ers and Seahawks championship game back in the Legion of Boom days and absolutely loved it. It had a real old school cat and mouse feel about it with both defenses dominating and the refs were basically letting them play. I loved every minute of it and I remember thinking "this is the game I grew up loving". I think Brady said the NFL is really just college ball now and I really don't enjoy watching it as much, but I realize that's my age more than anything and people who watched the game in the 50s and 60s probably said the same thing about the K gun and run and shoot offenses.
I think that's why I love Josh Allen so much, he has a real old school attitude about him when he trucks defenders and goes all in.