IMO finding good birds is difficult, even SOP birds are too often lacking and do not match what was produced decades ago. My AMs are NOT met birds and my BCM are NOT meat birds. A couple of the SS roosters were better. I figure if only a small percent is kept for breeding or egg laying, than the others better make a good meal or 2 or 3.
Yeah, that's one big thing I don't like about Ams. Too small. They size up ok when crossed with a Marans roo though. I'm planning to 'import' one more batch of hatching eggs before I stop for the season, and hopefully can find some Ams I can use to select for size and still keep the blue egg gene nice and strong. I like the pea comb though, since it's associated with the blue egg gene and helps me narrow down my culling for likely olive-eggers.
I had SS for a while. Hatchery stock, so nowhere near the original breed purpose. Good cold climate birds though, and the cockerels were tasty.
So many variables! Working with a single breed/species definitely cuts down on the mess, but I like the surprise bonuses with my crossbreeds.
I have another hatch coming on the 14th with my new golden cuckoo roo, so I imagine my grow out pens will be very colorful this summer.