When I started building my stash, I tried to get a variety of all colors but only purchased half yard or yard cuts. Big mistake! Most quilt patterns call for way more yardage than that! I I'll have to use it up in small projects or scrap quilts!
Now I try to add neutrals such as white, black, cream, tan, grey, etc. when I find good sales. And I try to buy 3-4 yards of each. That way when I come across a quilt I want to make, I am free to purchase the focal fabric without having to worry about the background because I have a stash of neutrals. Of course, if I fall I love with a fabric line, I purchase as much of that as I can afford....
I love the browns you have chosen. Will have to add some browns to my neutrals stash!