Perhaps in this fanfiction, drunk Harry Potter could lose his inhibitions and start confessing his deepest secrets. He might reveal his true feelings about certain characters, like how he really felt about Snape all along. Or he could start babbling about some of the more dangerous magic he's been secretly studying, which would surely get the attention of the Hogwarts faculty.
Well, one possibility could be that drunk Harry starts casting random spells all over Hogwarts. He might accidentally turn the Great Hall into a giant ice rink or make the portraits start singing opera. Another idea is that he thinks he's on a wild adventure and tries to 'fight' imaginary enemies, causing chaos in the corridors.
In a 'drunk Harry Potter goes crazy' fanfiction, he could end up wandering into the Forbidden Forest while drunk. There, he might encounter strange magical creatures that he normally wouldn't interact with in his sober state. He could befriend a group of centaurs by accident, or get chased by a pack of werewolves. His drunken state would make his reactions unpredictable, adding an element of danger and excitement to the story.
Neville could be in it too. He might be initially shocked to see Harry in such a state but then tries to help by using some of his herbology knowledge to make a potion to counteract the drunkenness. And Malfoy could show up, taking the opportunity to mock Harry until Harry, in his drunken craziness, does something that scares Malfoy off. Also, Hagrid would surely be around, being concerned about Harry and trying to get him to rest in his hut.
Well, one possibility is that Harry could face new magical challenges there. Durmstrang is known for its different approach to magic compared to Hogwarts. Maybe he'll learn some unique spells or face dark magic threats that are more common in Durmstrang's curriculum.
Maybe Harry Potter goes to Africa to study some unique magic that only exists there. He could encounter new magical creatures and make friends with African wizards.
Well, perhaps Harry could be on a quest to find some ancient magic artifacts in Egypt that are related to Hogwarts' history. Maybe he discovers a hidden connection between Egyptian magic and the magic he's learned at school.
In this fanfiction, perhaps Harry goes to Azkaban to rescue someone. It could be a fellow wizard who has been unjustly imprisoned. He might have to use his skills and some new-found magic to navigate the dangerous and dreary corridors of Azkaban, all while avoiding the Dementors.
One possible plot could be Harry struggling to fit in at Harvard. He might be the only wizard there, so he has to hide his magical abilities while also trying to keep up with the intense academic curriculum. For example, he could use his quick thinking skills from his Hogwarts days to solve complex problems in his Harvard classes.
In a 'Harry Potter goes to jail' fanfiction, perhaps Harry breaks a new law that the Ministry of Magic has created to maintain control. For example, if he tries to teach magic to non - magic people in an attempt to prepare them for a potential dark wizard threat. The Ministry, fearing chaos, throws him in jail. Inside, he meets other wrongly - imprisoned wizards and they plan an escape together while also fighting against the unjust system.
One possibility could be that after facing too many dark magic encounters, Harry's mind starts to break. Maybe the constant threat from Voldemort and the losses he endures, like the death of his friends, push him over the edge. He could start to have hallucinations and lose his ability to distinguish between reality and dark magic-induced illusions.
Well, perhaps Harry Potter goes to Dalton and discovers a whole new world of magic there. Maybe he meets new friends and has to face different challenges compared to Hogwarts.
In this fanfiction, it could be that Harry Potter has a vision of a future where Voldemort has completely taken over the wizarding world and killed all his loved ones. This drives him into a state of madness and he goes on a rampage. He travels back in time using some ancient magic he discovers, and starts to take out all the Death Eaters one by one, not caring about the consequences, as he believes it's the only way to change the future.