Fall and Winter can be a dual-edged sword for photographers.
On the down side, colors often become muted, and days are shorter thus cutting down how long you can remain outside shooting without the complication of tripods and time exposures or the use of high ISO settings / films.
On the other hand, the light is often quite low, providing striking side lighting on objects normally far less illuminated during Summer. And those same muted colors can be an asset, reducing the palette and emphasizing form and composition over richness.
These cooler months and shorter days can also provide interesting atmospheric conditions, like the slight mist seen here veiling Portland’s Steel Bridge on a cold December day.