When you put all same fabrics together, you can be sure you will like it a year or ten from now; but to mix those fabrics up, you need to lay out the entire quilt top, leave it for a week or two, and look at it again, peeking in to see if you still like it; and how others (friends, family) will respond to it. I don't see a color scheme in your mixed-fabric blocks. Is there a color scheme?