I have 1 Australorp and chose my entire flock based on heat tolerance. The "Austra" is Australia, so 1/2 is heat tolerant

She's fine...except broody right now and very pissy. I pick her up every day and put her outside for a little while and oh my Lord does she fuss. I call her a little cranky pants and put her down on the grass for a bit. I don't have a rooster and she's so snarly the other girls won't even lay in the box with her in it. So she's broody on nothing.

My other chickens are light Brahma, Delaware, Whiting True Blue, Speckled Sussex, Cuckoo Maran, and White Giant.
I'm not a fan of the Delaware. They're loud, bossy, bully the other girls. Their eggs are a medium brown and not particularly large.
Truthfully, for eggs the whiting true blue lay a consistently large blue egg, about 5 eggs a week per hen. They're more timid and smaller than my other girls but I took a chance. I always worry about hawks which is why I primarily choose heavy breeds. But I would get more of those.
The Marans are very sweet, as are the Sussex. Neither's eggs are particularly special in any way.
The Brahma's egg is GINORMOUS.
The White Giants egg is a sweet little light pink thing for such an enormous bird.
In the past I've had many other breeds. It's all fun to me, and since I'm down to 12 birds and have a really big coop I'm thinking of getting a few more chicks. I'm enjoying reading people's comments while I consider what new breeds to get. Thanks for starting the thread!