One thing I’ve learned in my many years of painting is that “the best way” to do something is a hard term to use. There are so many ways to express yourself in paint, that only you can decide what’s “best” for you.
What I can say however, is what’s best for the way I work, and my “best surface” to paint on is definitely wood panels.
Why do I prefer them over the traditional stretched canvas?
The surface texture; you are the master of your texture from eggshell smooth to gritty rough, depending on how you prime it. I like a random brushstroke finish, which I achieve with a large brush. I’ve illustrated this process in the video below. Yes, you can purchase canvas in varying degrees of roughness, but I can decide on the fly how I want the surface for a painting to be and create it without leaving the studio.
Support structure; a panel is a very solid surface, it will stand up to techniques like heavy palette knife scrapping and sanding, which I like to do to diffuse dry areas or take down a heavy buildup. A panel stores safely and unfazed while stretched canvases can get dented and even wavy while being stored. The type of wood I use is 1/4″ MDF, which is a medium density fiber board. It has no grain like plywood, it is wood fibers fused together with adhesive to form a very sturdy sheet.
You can purchase panels from art supply stores of buy sheets from home improvement centers, but you will need a saw to cut it because the sheets are large. Most places will cut it for a price. It would be worth buying a saw to do it yourself if you like the surface.