Min, it really depends on your source for the breeds. Birds carefully bred to the standard can be very different than ones coming from a large hatchery.
I have a hatchery Welsummer. She's very timid, moderate layer, never broody, and lays pretty speckled dark brown eggs.
My black Marans was from a breeder project. She is friendly, fairly calm and a good layer so far in her first season. Not broody so far.
Grumpus, the silver laced Wyandotte, is the worst example of a hatchery bird. Terrible disposition. Good layer the first 2 seasons, but no eggs since last year's molt ended with disastrous results. (I will post a pic later) Never broody,
Hatchery buff Orpington is a sweetheart of a bird, my son's favorite, but she only laid moderately well the first season, infrequently the second, and not at all since then. Never broody. Cuckoo Orpy from breeder is huge, as they should be, good tempered, and lays fairly well in her first season, but the eggs are relatively small for such a monster bird. Jubilee project Orpy (emphasis on project!) looks more like a large hatchery bird, decent layer, but again, small eggs. Both the breeder Orps went broody by 7 months.
I had a hatchery Silkie. Great bird, smart, very broody. They're a small breed in US.
Haven't had any of the others, but have heard
not good things about hatchery Favorelles. Also, they tend to be a timid breed and will get picked on if mixed with more aggressive breeds (which is just about all of them!) Can have same issues with Polish (they can't always see well enough to interact in socially acceptable poultry way).
Another note about Favorelles, feathered legs are not great in the mud.
I would get just about any of them, especially Wellies, Marans, and Legbars because of the colored eggs. Barnvelders are beautiful! Orpintons are great, especially if you like little feathered dogs. And any Wyandotte will be better than Grumpus, and they are very pretty (most of the time
).
Terrible to have so many choices!
I would try to get breeds that fit with my existing flock. What do you have again?