When I am doing scrappy quilts I can use hundreds of different pieces to complete a quilt top. I just finished one scrappy quilt top from a challenge here that I have no idea how many different fabrics are in it and am also working on a king size quilt that has several hundred different fabrics in the various blocks. For me the more the merrier. It is a good way for me to go through my scrap bins and make wonderful use of all those pieces. When I make double wedding ring quilts I can have easily a thousand different fabrics as I am cutting and using so many different pieces. Keep in mind I have been saving my scraps and using them bit by bit for more than 30 years now and some are older than that. Anything over 2" is saved.