Not to stir the pot but,......we started with chicks from Mcmurray years ago and got several different breeds. All of the birds were reasonably represented and met our expectation for $2-$4 birds. We were surprised that some of the breeds we weren't as excited about turned out to be prettier or nicer than we expected and we found over the years that I do not like certain very common breeds because they are just higher strung than I like. I now definitely have my favorites but none of them would win production or meat awards, but I value:
#1 temperament, calm birds are so much nicer to be around and getting along with each other nicely counts too
#2 beauty, I want to be happy with the view (I do tend towards things being the same, but like some variety in my chickens)
#3 production last but still valuable, I really do have my chickens for their eggs and I do eat the extras (though any special birds can earn a free life on the farm pass)
I do suggest that you decide the order of your needs and then look for breeds that tend to have that reputation. I also admit that once I saw how stunning the show versions of my favorite chickens were.....I was so hooked on getting some of them, I willingly pay much more, but the lessons and breed experiences we had from our first hatchery birds were priceless. Also if you are really bent on more effective egg to cost ratio, you will likely be replacing your first egg laying birds either around 18 months or after 2 years. The second year isn't as productive as the first 18 months and they head downhill from there. So if you get different types now or end up with some you don't really like, it is only a little while before you will likely be willing to spend a few more dollars than that to get some of the breeds you may find strike your fancy later on. Birds from breeders cost more, usually at least $7 or 8 -$20 on up from some breeders, so cost is also something to consider. The things your first birds teach you can be extra hard to take (should some of them die, sickness, predators, etc....), if your initial investment is so much higher than just a few dollars a bird.
My personal favorites for myself are Silkies, Faverolles, Cochins and BLRWs (all those for temperament and looks cause not the most productive), but for eggs, I love to find the Easter eggs already colored so Marans and Americanas, EEs and Araucanas make the grade too.
P.S. The way we narrowed down our first wish list for breeds was to take the Mcmurray catalog (free), circle all the ones we wanted, then cross off any that weren't specifically calm, gentle, non flighty etc, since that was most important to me.
Hope this helps some.
Kat