For me, Go helped to highlight certain temptations to behave irrationally, which I think can carry over to real life.

One was the temptation to avoid thinking about parts of the board where I'd recently made a mistake.

And if I played a poor move and my opponent immediately refuted it, there was a temptation to try to avoid seeming foolish by dreaming up some unlikely scheme I might have had which would have made the exchange part of the plan.