I don't buy FQ very often because I don't see groups I like very often. They are always too coordinated for me, meaning there isn't enough contrast to make an interesting quilt. So I guess I too vote for groups of 8-10, with 2-3 'busy' prints and the rest blenders.
I love the idea of making my own package - offer a bunch of fabrics, let me pick 10 and give me a package price for them.