It has been noticed since the time immemorial that cognitive biases have a nasty tendency of being invisible to self (note the proverbial log in one's eye). Uncovering their own blind spot is probably the hardest task for an aspired rationalist. EY and others have devoted a number of posts to this issue (e.g. the How To Actually Change Your Mind sequence), and I am wondering if it is bearing fruit for the LW participants.
To this end, I suggest that people post what they think their current rationality blind spot they are struggling with is (not the usual sweet success stories of "overcoming bias"), and let others comment on whether they agree or not, given their impressions of the person here and possibly in real life. My guess is that most of us would miss the mark widely (it's called a blind spot for a reason). Needless to say, if you post, you should expect to get crockered. Also needless to say, if you disagree with a person pointing out your bias, odds are that you are the one who is wrong.
(Who, me, go first? Oh, I have no biases, at least none that I can see.)
I used to think it was so stacked against me that I could reverse the meteoric rise of oil's price ('08) by going long on it. (i.e. buying assets that would increase in value as the price of oil increased)
FWIW, if I had gone through with it, I could have (in the minds of many) claimed responsibility for its collapse a few months later.
Now my blindspot probably matches Gabriel's.
Trying to exploit "bad luck" by betting against yourself never works.