Let's take a peek behind the curtain: what are these families squabbling about right now? No two families are alike, and none of them are perfect, either. Whether your family is just two people and a pet, or two parents and 2.5 kids, or a giant mixed family with stepparents, there's plenty of love to go around. Each family has to figure out how to navigate their lives together: for example, some families have dinner together each night, and they work out any issues while eating a casserole. But…