Cats are solitary hunters, but they like to live in large family groups. Generally feral cats tend to fight more, as there is competition over territory and resources/mates. Adult cats tend to be much harder to introduce to new cats as by then they have developed their own territory and family. New kittens are generally accepted by most adults, but new adults won't be (again depends on the cat). Cats raised in isolation will also have social problems if introduced to others.
Cats want to train you. I don't LET mine do this. Every time they go to the door, and it's:
"hmmm...I don't know...ok (happy cat face)...NO!!!!....not sure"
DON'T let the comments go this far.
It's either in, NOW, or out, NOW. I have four ~ 1yo male kittens and a 12yo female. She knows the routine and behaves. I expect my cats to behave like my dogs, and I'll leave one out all night if he plays this game with me.
I also throw them off of my lap if they forget about their claws.
But, my female, "Favorite", knows I will never drop her bc I always "put" her on the ground.
They love, because they were born in a litter of kitties. They received love from their mother kitty and their siblings. They become independent, and stay fiercly independent but still they like to have kitty cat friends or human friends. It's not weird..
Some live together, or create a family. I think of it more like a fraternity or sorority house though. Because they are still individuals (they hunt individually) but come together at night or during the day.
Some cats at my old barn befriended my horse. My horse makes friends with all sorts of animals though. His best buddy was a hen, lol.