Keep in mind the fact that these players have bad habits or things they need to improve on should not be taken to mean they are not star players. No NHL player, not even Sidney Crosby or Alex Ovechkin, is perfect.
Feel free comment and to add any habits you feel have been omitted for these players. You can also add any player whom you would like to have discussed on this list. Each player was limited to only one habit for purposes of this list, but obviously they can and do have more than one thing they may need to improve upon.