I always try get kittens in pairs, as they play together and leave me alone. I keep them in the utility room when they are small so any accidents can be cleared up but most cats are soon litter trained. On nice days the door is open all the time, but they have a bed so they can come in for a sleep.
They are very good at making themselves comfy and need no encouragement to find the best spots, oust the dog from the sofa, who knew that something so small could take up so much space, and my Siamese cross likes to sleep in the my bed in the afternoon after a mornings hunting. The farm cat who is the rat catcher, climbs on me while I am trying to use the laptop in the evening.
I have four now and even litter mates become very distinct characters and often do not get on, girls are more argumentative than boys and will try and bully anything, even it's bigger than them. They are not called queens for nothing.
As they get older they do wander, and can end up with several 'homes', each thinking they are feeding a poor lost stray, even if its podgy. My children used to get really upset when the neighbours fed them and they did not come home. Unfortunately the neighbours never pay the vets bill, but you never truly own cats, they tolerate you while you are useful or until they get a better offer. They are not needy like dogs and totally self sufficient and very clever at training you to open doors when needed, just by looking at you.
I think they are more relaxing than dogs, but sometimes to get attention they will appear doglike, and compliant until you have done their bidding.