The first good bias that I have experienced in past incidents that I want to comment on is having confidence in myself and my fellow operators when tasked with an event that we can come to a successful conclusion. If I know we have trained and prepared for an event, I have confidence that we will get the job done correct and in a safe manner. I am a little bias when it comes to my guys being chosen to lead an event not SWAT related or asked to conduct department wide training. I am confident that the end result will be one of a high standard.
A few bad biases that I have experienced in past incidents are if the team is unprepared or the lack of proper use of training time, and still expecting a good result in an incident.