I also do a community box. the one layer has chosen a corner she likes, so it will be interesting to see if the others follow suit. here is what i have set up
my girl likes the left corner
probably not too big, its probably just from them laying on them. i finally got our first eggs this week, and a clue i noticed with mine was the hay in the box itself was not the normal matted down hay. the hen had made it more circular, like a birds nest. thats when i knew something was up.