Generally, they are docile little birds, but keep in mind that all chickens are individuals and some can get nasty (yes, even cute little Silkies). That being said, mine are little sweeties. Mine have large crests, so don't see too well, and I can walk right up to them and pick them up (though usually as soon as I step foot in the run, they're all over me). Mine are great layers, when they aren't broody. I get somewhere around 3-6 eggs per hen/per week. They are excellent mothers, but things can get a little crazy around here when they ALL decide to brood at the same time. I've got a dozen hens, so it wouldn't be too bad since you're thinking about a trio.
I think you'll adore them, but be warned, they're addictive. I myself started with a trio. Those days are long gone
I keep 12 hens and a couple of roosters through the winter, but once hatching season starts (which it has, I've already hatched about 35 chicks since this year began), I usually balloon up to somewhere around 80
Good luck!