A good broody is worth her weight in gold, that's for sure. Unfortunately I haven't had a decent one in a while. Walker keeps asking for silkies and I haven't warmed up to the idea, but their reputation for brooding does help his case.
When I first got into chickens I had a white EE I called Henzilla. I made all the newbie mistakes including but not limited to letting her set in a community coop (young, old, male, female), and letting them free range. She hatched 11 or 12 chicks and didn't loose a single one in spite of running loose in a barnyard with horses and goats. Lucky? Absolutely. But she also put quite a bit of effort into keeping them safe - I remember her grabbing one poor cockerel by the neck and repeatedly slamming him into the wall when he got too close. I swear even the hawks were afraid of that thing! I sold her before I realized the value of what I had, wish I had a bird like that now!