I like the fanfiction 'The Redemption of Yondu'. It shows Yondu's journey towards redemption and how Peter plays a part in it. It's a story that gives more depth to Yondu's character. Another is 'Peter's Discovery'. Here, Peter discovers something about his past that was related to Yondu and it changes their relationship in a new way. Also, 'Yondu and Peter: A New Beginning' is a fanfiction that starts a new adventure for them, with a fresh perspective on their bond.
One aspect of Yondu's human behavior in fanfiction is his relationship with Peter Quill. Fanfic writers might depict Yondu as a father figure in a more detailed way. They could write about how he teaches Quill about his heritage, not just through tough love like in the movies, but also through more patient mentoring, which gives a new dimension to their bond.