Any Orpington is lovely no matter the color. Yes, the more you handle them as chicks, the friendlier they will be. Introducing new birds to a flock always upsets the pecking order but, if they have been getting to know one another through the fence-*see each other but not touch each other* - for...
Welcome to BYC! If you plan to increase flock size, build a coop with enough floor space for the number of birds you intend to end up with. You need a minimum of 4 square feet per bird inside the coop. You also need roosting space for each (they should not and do not sleep in nesting boxes...