Yes, those personalities make it so much fun to have chickens! I know who may try to peck and can prepare for that, although the chicks (pullets now, really) don't attempt to do that much any more as I have been targeted as the momma hen and provider of treats. They also observe the bigger girls, my four full-grown hens who free range, interacting with me. They come running when I call and the chicks see them getting treats and such. They get frantic, calling out for me to hurry up and feed them! I have one cochin who is very friendly and comes over to be stroked. She's red. The black cochin and RIR will come over after that and love to be stroked on the breat, but not over their heads on their backs. Each to her own, I guess!
I generally make sure all of them have a full supply of fresh food and water everyday and right before I leave town. I can get my oldest daughter to drive over and check on them once a day while I'm gone - she gets to keep any eggs she collects, so she loves to do that!