The family would have to be a lot alike, I'd think. No people who hate social activities should live with party animals. Negative people should not live with positive people. Slobs should not live with neatniks. People who eat to live shouldn't live with cooks who live to feed people. People who cook should live with other people who cook - although I never have, it's a fantasy. Everyone should chip in and help to the best of their ability -- no gender roles for the chores. People should be able to laugh and joke around and enjoy themselves in their own homes. Loners should be able to be alone to recharge and enjoy being by themselves without masses of people intruding on their "me time". The house would have to be well-decorated. Not maximally, just pretty and comfy.
Personally, I like being a neatnik. Pack rats can cram their bedrooms with stuff and keep the door closed so I don't donate things by accident.
I love a good party, so people who hate socializing can't live with me. I like keeping a pretty happy outlook on life, encouraging people, etc. I love feeding people who love to eat, and I love the idea of living with people who love to cook and bake (and do it well). I am not fond of grumps unless it is their shtick (clowning around, teasing). I like people who love to try new things, love animals, love smiling, love exploring, etc. I don't like people who say, "You are always smiling". So what, it's a good thing! I especially love people who clean up after themselves, and properly - a place for everything, and everything in its place. Not to Felix Unger's specifications - I am not a total stickler, but most of the people I know are either over-cluttered or slobs. I hate clutter, but I like a few well-placed decorations that I love (mostly art hanging on walls).
Now, how to find that all in one large extended family, there's the rub. I don't think pack rats, total loners, negative people, people who eat to live, etc., would particularly like living with me. Vegetarians wouldn't mind, but vegans would. Also the ones who live with me have to not be gluttons. I don't want to be accused of making anyone fat just because they can't control their portion sizes. That has happened. I refuse to be responsible.
I always wanted to live in a commune. But everyone would have to be neat, clean, and tidy. And do work to bring in income. And share chores equally. And have private living quarters, although dining and cooking and cleaning up after would be communal. Of course, I was young and idealistic then (in my 20s). I planned to have a bakery. I didn't realize then how hard the work was. Especially for me, who is usually too lazy to bake, which is why I still fit through all doorways. I love my own baked goods and fudge and chocolate pudding, unfortunately, and I don't control my portion sizes.,,ever. In my head, baking is a time-consuming chore. When I actually do it, it doesn't take much time. But I keep in mind the time-consuming thing, and my laziness shouts Yeah!