In all these you are nicely juxtaposing saturated verses desaturated areas of color. Now, you may want to advance this by doing much the same with texture, contrast, emphasis (focal point) and generally speaking the advancement through layers. Great foundation...but more is asked of how the development of each piece will explain and accentuate the purpose (personality) of each respective individual. Keep in mind the connection—but also, the differences that make them unique. Type, as in the one, does this...yet remains a part of the group.