It all depends on what you need and are looking for in a bird? There are many things to concider; Do you have cold winters? will they be hardy. Do you want good layers, or certain color of egg? There are many. Do you want quality? go to a breeder. Each bird will provide you a different quality. Do your research and find one that fits what your looking for. Good luck!
My Buff orpingtons are great birds, gentle and lay well...but are a bit noisy!
Barred Rocks, are just amazing birds. They lay well and are hardy! Can't go wrong with them.
I love my EE's they lay green to greenish blue eggs, beautiful birds...but they take longer to mature.
Road Island reds are good birds, lay well, but a little more aggressive.
I have also enjoyed my Delawares, great birds too...lay fairly well, but are again noiser then some other breeds.
My favorite are the Red or Black Sexlinks, great all around bird. They lay well, they are hardy and are very friendly.
My least favorite breed are the (brown)Leghorns, too skiddish and flighty...and don't lay as well as I was told they would.