I think a dissatisfaction with your own style is something that most illustrators feel at some point or other, and I've certainly jumped about more than most in an attempt to find a perfect formula. This approach made me re-examine the way I added shadow and texture, and I even found myself drawing the roughs in a slightly different way, aware that I could do more than usual with elements such as candle light... if that makes any sense. Anyway, I felt I was using a different part of my brain, which was enjoyable!