One common theme is friendship. Their relationship often starts as an unlikely friendship that blossoms over time. They learn to understand and support each other.
Well, 'Kurt and Noah's Adventure' is also a popular one. It has an interesting plot where they embark on a journey together. It shows their growth as individuals and as a pair. The character development is really well - done in this fanfiction.
Another theme is self - discovery. In many fanfictions, Kurt and Sebastian help each other grow as individuals. For example, Kurt might help Sebastian become more empathetic, while Sebastian could encourage Kurt to be more assertive.
Good Sophia x Noah fanfiction often has well - developed characters. Sophia might be portrayed as strong - willed and intelligent, while Noah could be brave and kind. The relationship between them should be believable and progress naturally.
Another theme is Kurt's struggle with his appearance and self - acceptance, which the reader character usually helps him with. This can create a really deep and emotional connection between them.
I haven't come across a 'will x kurt spanking fanfic' myself. It might be a very specific and perhaps not so common type of fanfic. There are so many different types of fan - created content out there, and this one may be buried deep within the vast ocean of fanfics. You may need to use very specific search terms on relevant platforms to see if it exists.
One common theme is self - discovery. Both Kurt and the female character often go through a journey of understanding themselves better while in the relationship. For example, they might discover new aspects of their musical tastes or their personalities.
Archive of Our Own (AO3) is also a great place. There are many talented writers who post their kurt x todd fanfictions there. The website has a good tagging system, so it's easy to filter and find the ones you might like.