When you share a house with an Uchiha, you do not question the color scheme chosen for the paint, or the lackluster decoration, or the general austerity of the dwelling, something akin to a graveyard or an abandoned town. Uchihas like their quiet and solemnity, and they revel in this silence which is at once profound, deafening, disarming.
When you share a house with an Uchiha, especially if you're a Senju, be prepared for a lot of cats. A household can have four to as much as ten cats, each one following their master wherever he goes. Respect these cats, even if they have a tendency to turn any non-Uchiha into a scratching post. An Uchiha loves his cats, and if you cannot love the cats, then you cannot love the Uchiha, by example and implication.
When you share a house with an Uchiha, prepare for little to no conversation. They rarely talk, preferring to use their idle hours either reading, taking a nap, painting or tending to the zen garden outside. It is a common misconception that Uchihas are incapable of peaceful things, but they can, like any other shinobi, or civilian.
When you share a house with an Uchiha and happen to enrage the said Uchiha for one reason or another, it's best to give space. Leave the house for the morning. Don't chase him, because he most certainly won't chase you, unless he is mature enough to acknowledge that maybe this time, it's his fault. Come back to him during the evening, when his temper has most likely simmered down. Approach with gentle steps. Don't try to sneak on him. Don't speak. Just hug him from behind. If it's your fault, apologize. Keep your apology simple. Uchihas don't like wordy people - it drives them nuts. If he's mature enough to acknowledge it's his fault, he will say sorry. And then you now have the perfect excuse to mess up the kitchen floor, counter or table with him.
When you share a house with an Uchiha, do not be surprised if he wakes up in the middle of the night, dead silent or crying softly. Again, give space. Don't rush into questions. Just hold him, lean your head on his shoulder. Gently whisper that he isn't alone, that you're there, and if he would like some tea you would get up right now and fix it for him.
When you share a house with an Uchiha, get ready to extinguish small bouts of flame here and there.
When you share a house with an Uchiha, prepare for the most volatile of fights and loudest of shouting matches. Be sure your reflexes are in top shape, because he will hurl whatever he gets his hands on toward your head.
When you share a house with an Uchiha, understand that despite all of his complexities and tempers and sadnesses, he will give you all he is. The well known saying that goes 'if you can't handle me at my worst, then you don't deserve me at my best' applies acutely in this situation. He will love you as deep as the unending sea, with soaring sincerity as high as the moon, or maybe even the sun.
When you share a house with an Uchiha, do your best to honor that one vow he will ask of you.
That you will let him die ahead, because if you can't grant him this small promise, then he will destroy himself over your loss, because when an Uchiha loves, he also destroys.
He destroys himself.