Breed wise... what do you want the chickens for? Eggs, ornamental, pets...? Silkies can be difficult to hatch, as far as how they "chicken"... I'd call them ornamental broodies, as a rule. Haha
What equipment are you using? What happened last time?
Breed doesn't matter much towards hatchability unless there is a different skull shape to contend with, weak genetics in general or too closely bred. Diet of the breeder birds matters a lot more than the breed itself.
You'll definitely want a plan for the boys. Once, I set 12 eggs, 10 hatched, 8 were boys. Ugh! Another time, I set 8 duck eggs, 5 hatched, every single one was female. You can never know how it will go.
A good hatch rate from shipped eggs is 50%. The only time I've gotten 100% was when my flock was free range and I was hatching only from them. Since I did an equipment overhaul last fall I'm typically at 70%-90% now with my own eggs. Wish I could free range where we're at! Did another diet change to see what that does, will be setting eggs again here in another 2 weeks, 4 weeks after the change. It takes 2 weeks for changes in the egg yolks but I wanted to be sure.
I've seen the full spectrum from shipped eggs. From 80% to nothing at all, to 90% fertility out of 36 eggs, with only 1 hatching ok and the rest deformed/with issues when the equipment had operated flawlessly. I've had decent hatches after having battled incubator issues... close monitoring avoiding big changes. I've learned a lot!
If you have defined flock goals, it's best to buy what you're after.
Do you want a lot of eggs? Go with efficient layer breeds. Do you want meaty boys so that the plan is dinner? Go for dual purpose out of breeder stock, to get the size. Hatcheries tend towards leaner birds out of their dual purpose types. Do you want to know gender right off the bat? Go for Sexlinks or Auto Sexing breeds.
You can always do an assortment too, to find the breeds you like the best. I went about it with a "try them all" mentality. As a kid/teen I went through all of the Bantam types. Next go as an adult, I went with readily available, common breeds. Then I got into the rare and obscure. My favorites are Marans and Bresse, but I also REALLY like a colorful egg basket so I'm making my own blues/greens/olives now. Legbars are neat.
Breed wise, there is "typical" look/behavior, then there is bloodline specific look/behavior. Birds will vary in quality and type from one hatchery to the next, from one breeder to the next, based on the traits held within the breeding flock. They'll hatch as well as all of the variables allow.
I've had Orpingtons that were everything the internet says they are and I've had flighty ones that didn't lay that well. I've had EEs that laid on the eve of their 6 month birthday, others who didn't start laying until close to a year old. I've met calm Leghorns, small Brahma and nice Rhode Islands. From lap roosters to demon spawn.
I don't think there's anything about poultry that's black and white, it's all gray. Make a plan and then research a lot!