Jannie,
As Jaba stated (thank you), it truly is up to you and what you hope to get back from the swap. If you want one really large quilt that is cohesive in some way send the same fabric to all. If you want two quilts split it and send two different focus fabrics. If you are going scrappy you can send all fabrics different. I have seen many different things done and to be honest, I have loved all of the quilts that have been made as a final result of the Boomerang blocks. I hope you will join us. We are always happy to help and answer questions along the way too
So happy to see new names and "faces" and of course so thrilled over my continuing members.
Hugs
April