My husband has 4 kids (my 2 SKs and our 2 kids). His oldest is his favorite. He will admit it and honestly I think it's noticeable, at least to me a mom to some of his children. She can do no wrong. She isn't a bad kid but she does do shitty things from time to time like all kids do. But she is perfect in his eyes and never does any wrong. His other 3 kids he has no problem telling me when they do something he doesn't like. Like it's a fault in their personality.