It all depends!
On your lifestyle, where you live, how often you wear denim jackets, etc.
I actually have a faded wash denim jacket, a dark wash denim jacket in a different style (collarless), a white denim jacket, AND a military style medium fade denim jacket!
I'm a WAH, MOTG who lives in a very casual city and I wear my jackets as a layer under winter coats so they are 3 season items for me - winter, spring, fall. I wear them less in high summer because we have hot summers where I live and jackets are not required. I do find the white one is a spring/summer item primarily, and the faded one is a late summer, fall, spring item, primarily. I wear the darker wash one in fall/winter.