Went over to a little neighborhood street and enjoyed the look of these two houses side by side. I am experimenting with gouache and casein. I toned the sketchbook page with acrylic actually and painted over it with gouache. It still wanted to mix with the acrylic and I had to do several coats on the white to get it to be white and opaque. I had a great time and it is simple. Often I look for something that looks "arty" and I believe it is best to just do a quick value sketch and if it looks good it will be a good painting, even if one is painting the mundane.
Good luck out there. . .