I would suggest making them for one quilt. I started in October last year and did about six blocks with my scraps/stash. Nothing matches! LOL! I guess I could make six different pillow tops.
But now I've decided to join some of the others and use similar fabrics so the blocks can be incorporated into a sampler quilt. Check out some of the November or December BOM pictures. You'll see what I'm talking about. Just gorgeous!