I sounds like you would like to be able to make a scrappy quilt, but you have a problem with mixing different patterns and colors. It seems like you have hit on a solution, by mixing solids with prints! Why not continue that way, using as many solids as you need to make you comfortable -- it will be your own style of scrappy. As you work more with combining different patterns and colors, you might find you get more comfortable with it. When you like the way something looks, go with that. If you don't like something, keep substituting fabrics until what you see makes you happy.