I was born in Youropp, but I’ve lived in the US for just over half of my 28 years so I identified as North American, and said I’m a fan of both. However, I find American football more exciting, but I find association football more satisfying.
Put another way, I think American football is better to watch in and of itself. That’s not surprising; there have been a hundred little changes made to the rules to make the sport more exciting, mostly for the benefit of TV viewers. While there have been a few minor changes to soccer for the same reason, they’re mostly refereeing directives rather than rule changes, and haven’t ma
However, American football doesn’t generate the same passion. The same things that make soccer less exciting - mostly the difficulty in executing visually spectacular scoring sequences - make it much more gripping when those things do happen. The atmosphere at a soccer game is superior.
I’m a Tampa Bay Buccaneers fan. I was a Bucs fan before I moved to the US, even; it was just luck that they were the closest team when I moved here. I was thrilled when they won the Super Bowl. However, that thrill ranks slightly below Turkey winning from a goal down against the Czech Republic in the last European Cup - and I don’t give a shit about Turkey. If it was a Buccaneers Super Bowl win versus an England win over Germany, it wouldn’t even be close. I’d even prefer a Yeovil Town win over Hereford.
That holds true even though I follow American football closely, and I check soccer league standings once a month, if at all.
I think there are a few reasons why soccer is more popular despite being less watchable, and I think it has very little to do with what goes on during the match. One is that in US sports generally, it only matters who wins. Nobody cares about the Super Bowl loser, let alone the teams that lose in the first round of the playoffs. In club soccer, those teams have something to show for their success - a place in European competition, a higher cup seeding, whatever. In the NFL playoff losers have nothing except a worse draft spot. As an aside, I think that’s one of the reasons college football is nearly as popular despite being a vastly inferior product.