Having a thick skin doesn't mean that you're hard or harsh. I was lucky because I was born with a thick skin. That doesn't mean that things don't bother me, but you have to keep it in perspective.
It's hard to say what you learn acting a part. You find bits and pieces of yourself that are inside the character you play. You locate the relatable aspects of that character to your own life. So, in a way, every part you play forces you to discover things about yourself you might not have learned otherwise.
The only thing I won't watch is darts. And I don't watch cricket. How can you like a game that requires you to take four days off work to follow a Test? And I don't really like golf. I know a lot of English footballers play, but I know that if I go with the club to play, sooner or later I will end up trying to smash the ball with my foot.