Combeferre surprising the shit out of people with his manners. (He's polite as fuck, and most people don't expect it because of how he dresses sometimes.)
Enjolras noticing for the first time how beautiful Grantaire's voice is when he sings.
Courfeyrac remembering how everyone likes their drinks - coffee, tea, booze, etc.
Bahorel rescuing all the kittens from the shelter and naming them after the Amis.
Bossuet running into the corners of tables and counters and making up curse words like a ten year old.
Feuilly coming back from work with paint in his hair and on his clothes.
Joly putting band-aids on the Amis when they get hurt and then kissing the top of the band-aid for comfort.
Marius buying everyone birthday presents that are always perfect.
Jehan making everyone flower crowns and mix tapes with their favourite flowers/colors and favourite songs, respectively.
Cosette holding people's hands when they're worried or scared or nervous or anxious.
Eponine kissing people's foreheads.