I enjoy the NHL, and follow the local team (Carolina Hurricanes) pretty closely.
The thing that get me the most about the NHL is the refs. I know it's easy for fans to complain about the refs, but I think there is a level of consistancy and commitment to accuracy by refs in the NFL and NBA that is absent in the NHL. In my opinion, it is a systematic problem (steming from the NHL offices) rather than a characteristic of the individual refs.
I really wonder some time if the fans of other pro sports would put up with what NHL fans put up with when it comes to the officials.
Mark Cuban needs to buy an NHL team, and then let his ref-bashing statistics gurus loose on the league office