1. Soccer rules are easier to understand. Yellow Card, Red Card, off sides. Compare that to the complexity of the NFL rules.
2. Games start and end pretty close to the expected times.
3. Scoring is easier to understand. Put the ball in the net for a point. No touch down, field goal, extra point, two point conversion and touch back nonsense.
4. Gives you something in common with the other 95% of the people in the world
5. Virtually non-stop action.
6. Virtually no interruptions for TV commercials during game action.