One common theme is love triangles. Given their complex relationship in the original show, fanfics often explore different outcomes of the love triangle between Addison, Derek, and other characters. Another theme is redemption. Addison might be written as trying to redeem herself in Derek's eyes or in the eyes of others.
Well, it's hard to say who the 'best' is as it depends on personal taste. But some popular authors in the fanfiction community might be those who really capture the essence of Addison and Derek's complex relationship. For example, some authors who are good at writing detailed emotional scenes between them.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). It has a large collection of fanfics. Just type in 'Addison Montgomery Derek Shepherd' in the search bar, and you'll get a plethora of stories. Another option is Fanfiction.net, though the quality may vary more there.
One plot idea could be Addison dealing with the challenges of her pregnancy while also trying to balance her career. Maybe she has to make tough decisions between taking time off and continuing her work. Another could be the reactions of her friends and family to the pregnancy. Some might be overjoyed, while others could be worried about how it will change her life.
One interesting plotline could be them getting a second chance at love. Maybe after years apart, they meet in a different city and rediscover their feelings for each other. Another could be a plot where they have to work together on a very difficult medical case that brings them closer.
One potential love interest could be an old flame who re - enters her life. He could be there to support her during the pregnancy, and they could rekindle their relationship. Maybe he's changed for the better and is now more ready for a committed relationship with Addison and her unborn child.
In the religious context, the good shepherd is often seen as Jesus. He is considered to be like the shepherd who takes care of his flock (the believers).
The relationship could also develop in a more platonic way. They could be like sisters, supporting each other during doctor's appointments and prenatal classes. They might have arguments along the way, but always come back to support each other because they know how tough pregnancy can be.
The simplified musical score and song score of the Shepherd Song could be found on some websites. These simplified musical scores and song scores were suitable for different musical instruments, such as piano, flute, bamboo flute, etc. However, the detailed music score and song score content were not provided in the search results. Therefore, it was impossible to provide the specific shepherding song score and song score.