There's also 'Crossed Paths'. This fanfic delves deep into the relationship between Buffy and Angel in a post - series setting. It explores how their love might have evolved and what new challenges they could face together. It's quite detailed and the characterizations are spot - on.
Archive of Our Own (AO3) is also a wonderful source. It has a well - organized tagging system and often has some high - quality fanfics. The community there is also very active, so you can interact with other fans and even find some new and upcoming Buffy Angel crossover stories.
A common theme is the rekindling of their relationship. Whether it's a romantic or a platonic bond, it often focuses on how they reconnect. Another theme is the fight against a greater evil. Since both are from the Buffyverse which is full of demons and dark forces, this is a natural theme.
One great 'angel and buffy crossover fanfiction' is 'Crossed Paths'. It beautifully weaves their two worlds together, exploring their complex relationship in a new and exciting way. Another one could be 'Reunion' which focuses on how they handle a new threat together after being apart for a while.
Love and sacrifice are common themes. Their relationship has always been about love in different forms and often one has to sacrifice for the other. So in crossovers, this is often explored further.
I'm not sure if it's a popular work. There are so many Buffy fanfics out there. It might be well - known among some fans who are interested in stories about burglars in the Buffy universe, but without more research, it's hard to say for certain.
One popular one could be 'Soulmates Across Dimensions'. It beautifully weaves the two universes together, exploring how Buffy and Angel's relationship might develop further in new and unexpected ways. It has some great action scenes and emotional moments.
One interesting Buffy Angel crossover fanfiction could be a story where Buffy and Angel have to team up to fight a new, more powerful vampire threat that is immune to their usual methods. This forces them to rely on each other in new ways and re - explore their relationship.
Good Buffy and Angel fanfic often stays true to the characters. They should act and speak like they do in the show. For example, Buffy should be strong - willed and Angel should have his brooding nature. It also usually has a well - developed plot that ties into the existing Buffyverse mythology.
A must - read Buffy Angel Angelus fanfic is 'Soul Searching'. It explores the concept of the soul and how it differentiates Angel from Angelus in a very profound way. The author does an excellent job of bringing out the emotions of the characters. Also, 'Darkness Rising' is a good one. It starts with Angelus being unleashed and follows Buffy's journey to stop him, with lots of action and some great character development along the way.