my first set of 8 - who grew up together and I didn't happen to have any 'extreme' personalities (I did have 1 roo) insisted on sleeping on one roost. Since my coop proper was 4X4, it had 2 4 foot roosts - I assumed that 4 or 5 would roost on one, and 3 or 4 on the other. Nope! They would all cram onto 1 roost.
I think having different generations, and different breeds/general dispositions makes a big difference. But, I had BR, PR, & LBs then - all somewhat 'steady' breeds.
(most of my EE are much more 'mild mannered' than the

Queen)