These could be like the starting of a weird Hetalia RP or Hetalia short story or something, I give permission to everyone but this is just some odd thoughts I have.

A party is thrown at Italy's house and eventually everyone falls asleep (mostly in random places). The door opens and a team of like, ten burglars goes in as quietly as they can, thinking that there is only one, little Italian in the big, God damn rich house. The turn on the lights and the intruders nearly get shot by Germany, Switzerland, and America. The burglars run for the hills when they see Russia glaring at them to leave.

America or France finding England's old pirate costume and blackmail him to wear it at a party or meeting. England keeps accidentally speaking like a pirate and getting frustrated.

America and Canada playing professional hockey together, and Canada getting all competitive on the other team, while America is just like "Daaaaaaaaaamn, they just released hockey Mattie!". After some seemingly unfair calls from the other team, America and Canada GETTING INTO THE BESY FUCKING HOCKEY FIGHT OF THE YEAR!!!!!!! ((Sorry, I am imagining them fighting like bosses))

Spain pouting around the house while Romano keeps on desperately trying to make him feel better, with tomatoes, pizza, and a failed attempt on churros.

France and Poland going to each female countries house to help them with their problems.

Poland always letting you into his house if you're crying or feeling bad and need comforting, no matter who you are. (Even Russia)

Belarus not giving a fuck about Russia anymore and she becomes a self defence teacher for kids, then eventually completely leaves the house and goes traveling with (insert person you ship Belarus with or someone you think she'd be friends with here) around some of their favorite countries and places.

Germany, Italy and Japan becoming temporary preschool teachers. Germany can manage to keep the kids safe while he has three or four on his back and shoulders, and can hold a few others. Italy playing imagine games with the kids, like princesses or doctor.
Japan being the one who calms down any of the troubles and makes sure the kids get naps.

America getting a fake ID and going to drink at bars with Denmark and Prussia.

Japan convincing Germany to try meditation and Germany is so overworked he falls asleep right in the middle of it.

Italy going out with Romano and they flirt with girls, go shopping a bit, talk, movies, and get chased by the cops when Italy drives.

(Part 2)

Canada having to explain to America about the... S.e.x, since England didn't. Canada making France stay out of it so America isn't completely scarred.

Drunk Germany forcibly picking up Japan and carrying him over one shoulder, with Italy over the other, while Prussia and Romano watch.

Russia and America arguing so much in a meeting that eventually, Germany attempts to lecture them and gets caught up in the argument, then England or Japan stopping it.

Romano attempting to explain to Spain that eating tomatoes all the time is NOT what keeps his blood red but fails.

Hungary making scrabbled eggs and Prussia sneaking up behind her and scaring her. Gil ends up with eggs in his hair and a bruise on his face.

Italy desperately trying to get Romano's attention after being ignored completely by him for a month or two.

A BTT sparkle party with other several blushing countries. Japan is taking pictures. Germany, Romano, and Canada joining in.

Japan making a demon and Angels AU party.

America getting all happy over Zootopia and dressing like Nick the fox for Halloween. Canada getting forced/begged into wearing a Judy costume.

China slowly trying to explain to Russia to not sneak around, but Russia being like a cute and confused kid.

A jackass trying to make fun of America for liking a lot of small communities, like MLP and stuff, but ends up getting smacked by Japan.

Japan, America, and England having a movie marathon. They all start arguing over which movie is best.

Belarus jokingly calling Russia senpai. "Notice me, senpai."
"Nyet."
"I'll give you vodka."
"You have been noticed."

(Part 3)

America hug tackling people constantly for attention. England gets mad at him and tells him he's not in football anymore, Alfred tells England to suck on a tea bag.

France using the term "magic wand" a lot whenever he flirts with England. ;)

Prussia, Spain, and France always in a cliché whenever there is a sleepover, gossiping like school girls.

Austria screaming in horror when he sees Hungary cleaning his piano the wrong way.

Germany telling Italy that his dogs can speak to him, Italy replying that his cats do that. The two of them start a animal whisperers company but fail miserably.

Demon Spain telling human Romano that there is no hell. Lovino drops his religion and starts fucking bitches and shit, yelling "YOLO MOTHERFUCKERS".

America breaking a Nokia when he is typing a number in.

Greece throwing rude cats he doesn't like at people he doesn't like.

Turkey wearing a butterfly mask.

Japan putting anime face paint on people as they're sleeping.

China spinning with a hello kitty plushie when he's drunk, singing the SpongeBob squarepants theme song.
Russia eventually joins in.

(Part 4)

America rapping Eminem in the middle of a meeting, Austria freaks out every time.

Hungary screaming at people for using her frying pan and scratching it up.

Spain and England arguing who's eyes have the better shade of green. On England's side he has: Canada, Germany.
Spain has: Romano, France, America.
France and America just agreed with Spain to piss England off.

Romano and America teaming up to break the world record for worlds biggest pizza.

Austria trying to do Opera, since he really likes listening to it, but his voice either keeps cracking, or he's great at it but sounds like a chick.

Italy and Romano convinced for the longest time that if they didn't eat their vegetables, they would be have the shit beat out of them by the "Véletlen" fairy. Hungary made the fairy up and Véletlen means random in Hungarian, since she couldn't come up with a better name. The Italian brothers believed this until their teens.