I've given a thought to this: How will I chose my biscornu patterns?
Then I've decided: Each month I'll stitch a biscornu from a different designer with a different thread color per biscornu. Which means 12 different designers and 12 different threads, sometimes monochromatic, sometimes over-dyed. Sometimes cotton threads, sometimes silks, maybe even the "satin" thread from DMC, even if I really don't like it.
And I'm off to begin my biscornu now :)