I think mostly everyone’s style changes as they mature.
For myself, I never was into bags. My mom and oldersister were and they would give me bags to use. One thing that I knew that hasn't changed is that I never liked bags that were too loud. I didn't like crazy colors, branding all over the place, or clunky hardware.
When I was younger I never carried a bag unless it was my book bag for school or special occasions where my mom would give me a smaller bag to carry.
It wasn't until I got older (early 20s), that I got into Longchamp and their simplistic design and functionality for college. I gave away a lot of the bags that were handed down to me by my older sister and mom because I hated having bags in my closet that were just taking up space, I knew I would never use them. From there I developed a love for softer leather bags and more classic styles. I have started building my collection based on my own tastes. In addition, I work in a corporate environment so I have a couple that are more structured just for work.