Satan, what bias are you referring to buddy?
I see two main types of bias, one good and one bad. Exact terminology of the two I have no idea, but here's two examples.
The Patriotic American
I like yanks, don't get me wrong. But as I have witnessed on a number of other forums, the patriotic bias can be extremely detrimental.
Billy is the hardcore Texan. He loves his country and would bend over backwards for it. He also trades FX. His patriotism has placed a set of blinkers on his noggin and he can't do anything but long the dollar. Even when it's in a raging bear trend. He just loves his country sooo damn much that he thinks it will bounce back at any moment, for they, the United States of America are the most powerful country in the world. So he longs and longs and longs. Soon enough, his capital is gone and has to go back to his slave job.
The Prudent Investor
Wally researches a stock until his fingers are clicked to the bone and his head hurts from the weeks of constant reading. He's performed some serious extensive technical and fundamental analysis on the stock and all conclusions are pointing to a potential downward move. Johnny has determined his potential R:R and knows exactly where to exit if he was wrong. He then realises that the herd and the experts on Bloomberg are quite bullish. This has him questioning his hard work and resultant "bias".
The question is Satan, what sort of bias do you have? First or second? If it's the first, then you do need to do something about it (exactly what I have no idea, sorry). If it's the second, forget about it. As long as you know where to get out if you're wrong, you're laughen mate.