Friendship is a very common theme. Since they are friends in the original, fanfics often explore different aspects of their friendship, like how they support each other through tough times at school or in their personal lives.
One popular fanfiction might be 'The Unspoken Bond'. It delves into the relationship between Charlie Brown and Peppermint Patty in a really sweet way. It shows how they might gradually realize their feelings for each other through small, everyday interactions. Another could be 'Peppermint Patty's Heart', which focuses on Peppermint Patty's perspective as she falls for Charlie Brown. There's also 'Charlie Brown's Secret Admirer' where Peppermint Patty secretly admires Charlie Brown and there are some really cute moments of her trying to get his attention without being too obvious.
One interesting storyline could be them going on an adventure together in the woods. Maybe they get lost and have to rely on each other's skills to find their way back. Charlie Brown's cautious nature and Peppermint Patty's boldness could create some really fun interactions.
One idea could be that Charlie Brown finally musters the courage to ask Peppermint Patty to the school dance. He spends days practicing what to say and in the fanfic, he overcomes his usual self - doubt and does it in a really cute and endearing way.
Some Peanuts fan communities might also be a good source. There are forums dedicated to Peanuts where fans discuss different aspects of the franchise. Sometimes, members will share their own fanfictions or know of others. You can join these communities and ask around for Charlie Brown and Peppermint Patty love fanfictions. It's a great way to interact with other fans and discover new stories.
Charlie Brown's insecurities can be explored more deeply. For example, Peppermint Patty could help him overcome his self - doubt in certain situations, like when he's facing a bully. His kind heart can also be shown as he helps Peppermint Patty when she's in trouble, despite his own fears.
Snoopy could be a main character. He might follow Charlie Brown when he runs away and be his protector in the unknown places. Linus could also be important as he might try to convince Charlie Brown to come back home, constantly showing up with his security blanket and giving wise advice.
There's a 'peppermint patty x marcie fanfic' that focuses on their school days. It details how they support each other during exams and deal with the typical school bullies. This one really captures the essence of their bond.