I recommend the BArred Rocks, I have a few and they are very personable, lay really nice brown eggs, they are also my only girls that have been laying pretty regularly this winter. My rooster is also a BR and he is the coolest rooster ever. He's pretty big even as far a roosters go (I think at least, but I'm new) but he's never mean or agressive to me, but takes excellent care of his girls, but is partial to other BR's.
I also adore my two Buff Orpington girls, they lay the largest pretty brown eggs out of my entire flock of assorted girls. One of my Buffs are raising two babies for the first time and is doing a wonderful job. Takes her job very seriously even though the babies are as big as she is, she lets them snuggle close on the cold nights.
But than I also really like my EE, she has such pretty coloring and the greens eggs are always a fun novelty.
All have done pretty well this last summer with our South Texas heat and didn't stop laying just tried to stay out of the sun as much as possible. They have also done well this past week with the Artic blast that came through, granted it wasn't as bad as up north, but for us here in the South it was too cold, now today in the 60's was great, especially in the sunshine.