Gryffindor: high-fiving someone so hard it hurts your hand (on purpose, and you just get even more pumped up + happy), catching things right before they hit the ground, "home is not a place, it's a person", buying dozens of notebooks but only writing a couple of things in each of them, balconies, assuming everyone speaks the truth, instant noodles, carefree jokes in the middle of fighting in action movies, hitchhiking, board games (with friends), adopting slang words/expressions from other people, road trips, drinking/eating straight from the container, forgetting to brush your teeth, explaining things with your hands or by showing, volunteering (sometimes just so that those who REALLY don't want to do it won't have to), constantly changing your ringtone

Ravenclaw: reading funny/interesting facts and forgetting them right away (except for the VERY fascinating ones), going to a foreign country without knowing the language; learning as you go/by experiencing it yourself and through failed attempts, multitasking (with questionable results), space, tearing paper as a stress reliever, preferring ballpoint + mechanical pens because the line they draw is even, procastination, blushing easily, either REALLY neat or REALLY messy handwriting, making sure everyone is drinking enough water (and not too much alcohol), never borrowing money but always lending it to others (with no rush to get it back), wind, green tea, talking really fast/loud when you get excited, laughing and smiling silently, only paying attention to the things that interest you

Slytherin: having a discussion with someone across the room by using just gestures and facial expressions/lip reading, ending up sharpening all the pencils instead of just the one you need, string instruments, both judgemental eye rolls and friendly and teasing eye rolls, never ignoring problems, taking one (or two) for the team, cutting your own hair/making your own jewellery and clothing; DIY, formal language with strangers and at work but swearing/using (internet) slang with friends and at home, never letting fate decide, keeping secrets (both others' and your own), forgiving relatively fast but NOT many times, avoiding telling white lies, mostly listening during conversations but impressing everyone with how intelligent and insightful you are when you do comment/speak

Hufflepuff: sunflowers and dandelions, (cookie) dough, colouring books, choosing the slightly smaller half of a halved pastry even though the other person said you could pick either one and they'd have the other one, bumblebees + honey bees, listening to loud music with headphones and constantly fearing others can hear it, humming and whistling, coffee and hot chocolate with lots of of whipped cream and spices, blanket forts, not feeling pressured to do anything "productive", always thinking it's your fault (it's not), having days for yourself; peace and quiet and self-care, movie/TV/Netflix marathons, procastinating at first and then working for hours and hours straight just before the deadline, rain (heavy or light), chocolate and peppermint and fudge