Interesting thread - a subject that hasn't been discussed in all the years I've been reading PPRuNe.
Decision-making has never been problem for me, but flying has made me far more patient and less impulsive. I often say that doing a PPL in the UK teaches you more about patience than about flying.
It's also made me a lot more tolerant. Before learning to fly, I'd found most things in life pretty easy. I expected to find learning stuff easy, and I wasn't that nice to people who had a hard time with things. But I struggled with learning to fly! I found out what it was like to feel that a skill you were putting everything into seemed to be impossible.
And I eventually learned not to be so hard on myself, and to be a bit kinder to other people.
So I'm possibly a nicer person since learning to fly. OTOH, I'm now a crashing bore who talks aviation far too often, and probably so self-confident that I'm unbearable a lot of the time.
