?? Isn't it sort of obvious that it's the desire to get enjoyment out of watching sports that led to the question of the thread?
It's funny: the types of responses in this thread clearly reveal the Types of Fans.
1. The Fundamentalists: their team is not really about sports, it's a religion. Loyalty to this team is a mark of character - any perceived deviance from loyalty must be punished or silenced. Lack of loyalty is a moral failing. Pointing out flaws is lack of loyalty.
2. The committed realists: they will never quit their team, and they aren't really interested in the sport outside of their team, but they will recognize flaws in their team and adjust their hopes according to how good the team is likely to be. The don't necessarily like to be reminded of how shitty their team is, though. Kind of like decent Southerners, who acknowledge the racism, but will get pissy if you keep pointing it out.
3. The NBA fan: they have the Blazers as their favorite team, because you've got to root for someone, but they like basketball and can get caught up in other teams if they play in an appealing way.
4. The total bandwaggoner: only like the team when they're likely to be good.
Currently, the Blazers have none of type 4. However, type 1s think all other fans are type 4s.