"Hearing" doesn't mean acting. You have a history of bias. That you can't see it may actually make it prejudice.
I know that I'm biased, which is why I like to be told when people feel that I am. That being said, I don't care if my bias causes me to declare a guilty person innocent, only the other way around. You could even say that the previous statement is biased, and you'd be correct, except that it is very intentional.
This is fair in a criminal court.
However, civil charges and liability involved, declaring a guilty person innocent directly harms other people, so I think you should care and carefully consider the damage of any decision.