Leah Day has two classes on Craftsy that each show 50 different FMQ patterns. She uses a quilt that is just different colored rectangular blocks, much like your quilt. Each block is FMQ'd with a different pattern. You might check that out.
Another idea -- I made a quilt for my MIL that had some nice long rectangular blocks and had the LA-er put in dates that were special to her -- her birthday, my FIL's birthday, their 3 children's birthdays, their anniversary, their grandchildren's birthdays (she only had 3 grands). She loved it.