Welcome to the friendly and fun site!!
I agree with paying more for the sexed chicks. The only reason you would need a rooster is if you want your hens to lay fertile eggs for hatching. Roosters are not always good around children, but some are, just maybe better to not take the chance.
I have Rhode Island Reds, they are not mean and I have Barred Rcok that is not mean. I also have a silkie that is so sweet and lovable, but silkies lay very small eggs and go broody a lot. That means they like to sit on the eggs and try to hatch them, even if they are not fertile.
It seems I may want to try getting buff orpingtons from what I keep hearing about how friendly they are!!