I don't make pets either. Have australorps and they're not docile or friendly at all.
Meanwhile my Delaware, supposed to be grumpier follows me everywhere.
Broad brushes don't work.
From a production standpoint the sex-links are going to be the standouts.
Attitude of the birds has more to do with you imprinting them than anything.
Second the comment about heating your coop. It's not necessary. Birds are bothered by heat more than cold.
Ventilate your coop.
Ventilate...