I only buy FQ when they are on sale, but I do buy lots of half yards of fabric, so in my mind I buy two FQ at a time.
But my LQS gives free FQ with each purchase, even those half yard purchases I make, so I made it a point to only take blue FQ since I knew I would someday make a bed quilt for my bedroom in blue. It is a testament to how often I am in that place when I see how many FQ I have accumulated.