Well, this is a suggestion for developing the style. Every 25 comic strips, I create a special strip based on famous artistic creations. I am talking about versions of paintings of Goya, Vermeer, Dali, Van Gogh, Arcimboldo... It's a nice experience to study a painting and to create my own hommage with my characters. A direct link can be shown here. You can also check all the multiples of 25: http://aliphant.iespana.es/art.htm