Exactly as the name suggests, this is a 'Nice Dursleys' challenge suggested to me by Shadowlord1329, here are the rules provided:
Up to the author how the Dursleys are nice
Harry and Vernon must bond over an activity(like restoring cars)
Petunia must make sure Harry has a real family after feeling immense guilt over her jealousy
Dudley must be Harry's Best Muggle friend
When the Dursleys come to Hogwarts, Dudley must punch Ron in the balls due to finding out about being a prat towards Harry
Dudley meets Luna and becomes her friend due to him witnessing her being bullied when visiting.(Up to you if you want the Dudley/Luna pairing)
Vernon will help Harry increase his fortune via stocks and reading up on wizarding law
If you don't go the Dudley/Luna route, Ginny must meet Dudley and become his other wizarding friend(ie Dudley/Ginny pairing)
NO canon pairings