So far I have had Barred Rocks, RIRs, Silver and Golden laced Wyandottes, Buff Orpingtons, and Black Australorps. I think the Rocks had the best personality, RIRs were second in this respect. (But these chicks lived in my daughter's bedroom closet until they were flying, because the coop wasn't ready for them!! Got lots of handling and other special attention.) Great longevity and egg production, both.
I love the Wyandottes for their beauty; the 1st 2 GLWs were a bit aggressive; the SLW were not aggressive, but fell quickly to predators while free-ranging; the 4 GLW hens I have now are not aggressive and are a delight to the eye and silky to pet. Love the Australorps and Orpingtons, too.
Don't really know who is laying what out there, but all of the eggs are shades of brown/taupe/some with darker brown spots.