For a small back yard flock, there's a few more q's that need to be answered.
Where do you plan to get them from? Day olds or adults?
How much space do you have? What do you plan to do when they get old? Plan on a rooster? Want birds that go broody? Do you live in Canada or somewhere with extreme cold?
How about predators? In a fenced yard it doesn't matter, but for free range some breeds spend more time under cover (my Silver Spangled Hamburgs were good for this.)
All chickens can be tamed. Food is the way to tame them. I prefer to feed once per day, that forces birds to be a bit hungry and then they follow you around. They can be tamed with bread or other treats. You just have to spend time with them. Key to working with birds is to move real slow. Fast movement alarms them.
Cochins, and buff Orpingtons are favorites for being tame. My dark cornish were mixed, some very tame, some wild.
Most breeds were bred to be dual purpose, but this means that they eat more for the eggs you get. The dark cornish could eat like you wouldn't beleive, where my hamburgs didn't eat much at all. The same was said when the bird was butchered, cornish were huge the hamburgs skinny soup birds.
Here's a good point, the comb is for temperature regulation. The bigger the comb the better the bird deals with extreme heat, but they will shut blood flow in extreme cold and it will freeze. (It then grows out but the comb stays ugly).