It's a tricky one...I am doing a random scrappy at the moment. When I was playing about with some of the finished blocks I decided I would sash them in a solid colour. Didn't think of distributing a solid block amongst the randoms. I think the solids make it look interesting, but then the chaos of the randoms against each other is cool too. All in all not much help am I....but I love your blocks so keep us posted.