I have only really tried with two basic patterns. I like ribbons included. Especially if they have metallic thread on the edges as it gives just a little bit of glam. I'm going to have to invest in some more ribbon I think. The thinner ribbon is better. It fits into the weave neater.
When I bought my Kumihimo disc I also bought some micro macrame string and some texture ribbons. I think the textured ribbons give a beautifully soft finish but if used in necklaces I think they might stretch too much.