I started as a big fan of the NFL, MLB, and NASCAR. I lost interest once the MLB no longer gave a damn about smaller market teams. Really starting to loose interest in the NFL because they need to make rule changes for rule changes on top of rule changes. Slowly starting to loose interest in NASCAR due to the fact that they believe 'stage racing' is more appealing. I have much more respect for the NHL. Some slight rule changes for player safety, but not getting rid of the physicality and fighting, plus the fact that small market teams can actually compete if they have a front office that knows what they are doing.
You're allowed to sweat, bleed, cry, and even loose bodily functions...but you are NEVER ALLOWED TO QUIT!