I figured this might be a good topic for all of us football fans. What exactly about the game draws you in? For me, it's a few things:
1. The strategy - So much goes into every aspect of the game regarding not only playcalling, but pre-snap adjustments and execution on the field.
2. The action - Once the ball is snapped, everyone on the field is moving. It's fun to watch these guys put in the effort on every play that they do. One mistake, or one great move by a player, can change the game.
3. The team aspect - everyone on the field has to do their job, and just about every player on the roster contributes in some way. For example, on offense, the OL needs to block, the QB needs to make good passes, the RBs need to block or find the holes to run through, and the WRs/TEs have to get open, or contribute through blocking. If one person screws up or doesn't put in the effort, he can screw his team over.