Something I enjoy doing when I'm not colouring comic lines, is vintage #PhotoColorization. Fun fact: this is actually how I got started with Photoshop, about 20 years ago.
I did this one in 2020, it was my most ambitious image yet and took about 20 hours. I went with a bit more stylized colour look on this one.
Santa Fe Trailways in 1940. Original black and white photo by Russell Lee via Shorpy.