Really, everything wonderful that can be said about these birds has already been said. They're incredibly friendly, hardy, easy to take care of, the least aggressive birds I've ever seen. The roosters are especially awesome. I've had mine (his name is Phantom) since he was about 10 days old. He's about 6 months old now, and is funny, charming, sweet as can be, and a VERY good father. He gets along with dogs, cats, and any other chicken I've had him around. He (like all my others) is a house chicken, and Silkies are great for this.
A couple of months ago, I picked up a couple of 5 day old chicks; a frizzled Cochin, and a porcelain d'uccle. They cried and cried in their little brooder box, so I decided to try and put them in with my hen (Polka Dot, a sizzle) and Phantom. I kept a close eye on them, but Polka Dot took them in immediately, and Phantom went right into parent mode. If one of the babies needed anything, he was right on it. Somehow he could tell when they were hungry, and would walk over to the feeder and cluck away until they came running. He would watch over them while they ate, and would even gently nudge them back under mama when they were ready to go get warm again.
The babies are now over 2 months old (the frizzle is a loud and proud rooster with a MASSIVE comb), and Phantom is still watching over them. When they're scratching and pecking outside, he is constantly on the lookout for tasty bugs to give the babies. It is just the most heartwarming thing I've ever seen. He will kill the bugs, and call to the kids and his special hen so they can eat. Even when I try to give him a treat that is just for him, he gives it away to his family. What a sweetheart!
He does (like all roosters) enjoy crowing often, but even for a quite large example of a bantam, it doesn't bother me at all. In fact, if he decides to start crowing before I'm ready to wake up, I can easily go back to sleep, if he wakes me up at all. His favorite thing to do is cuddle - he will snuggle up on your chest and lay there as long as you can stand it. Movie marathons are a favorite in our house, and it's usually me with a Pitbull on one side, a cat on the other, and Phantom snoozing in my lap. Awesome.
All in all, every Silkie I've owned (I have 2 1/2!), seen, or met has been amazing. I can't recommend this breed highly enough - especially for beginners, because I was when I got him, and it's been a wonderful experience.