Pretty much any activity that you participate in for a long period of time will change you in some way, mentally and/or physically.
I think skiing has made me a more confident person in many situations. Riding the chairlift with people from so many different backrounds and striking up conversations with them has made me more social person, and It has really made me come out of my shell and express my personality.
Challenging myself physically and taking hard falls has made me more persistent.
Interested in your responses.