I have silkies, cochins and EE's - My silkies are the friendliest, my EE is sweet and adventurous and my cochins are sweet too...I would go with silkies - they are my favorite, but I would not get buff or white if you like other colors. I would go with blue, black and splash. They can be put in the same coop together, if you get buffs they will have to have their own coop, that goes for the white and partridge as well.
I hope this helped!
I hope this helped!