I am in my 40s also. I have not changed much in the last 5 years, but then again that is just over 10% of my life. At 25, 5 years represents 20% of your life and the part of your life where most people change a lot. Perhaps we should both do something crazy and change our hairstyle for a couple months. Then we can reminisce later about that crazy period in our forties.
"Youth is wasted on the young" - George Bernard Shaw