One great 'Castiel and Gabriel fanfic' is 'Heaven's Unlikely Pair'. It beautifully explores their relationship in the context of the Supernatural universe. The story has a great plot that keeps you hooked from start to finish.
A popular one is 'Wings and Leather'. It focuses on how Castiel's angelic nature and Dean's more rough - and - tumble hunter side complement each other. The fanfic shows their journey together, facing various challenges and growing closer as they do so. It's full of great action scenes as well as some really tender moments.
One of the best tropes is the 'Angel and Human Bond'. It shows the unique relationship between Castiel, an angel, and the human Winchester family. Another great one is 'Redemption Arc' for Castiel, where he tries to make up for his past mistakes. 'Soulmate' tropes are also popular, imagining Castiel having a destined connection with someone in the Supernatural universe.
A really popular one is 'Angel's Love'. It delves into how Castiel's angelic nature and Dean's human tenacity come together in a romantic relationship. The story has some really heart - warming moments as well as some tense action scenes.
One great fanfic is 'A Little Slice of Heaven'. It beautifully explores the relationship between Dean and Castiel. The story delves deep into their emotional connection, showing how they support each other through various trials. The writing is vivid, making you feel like you're right there in the Supernatural universe with them.
Another place could be FanFiction.net. There are many talented writers on that site who write about this pairing. However, the quality can vary. Look for stories with high ratings and lots of reviews. These are usually well - written and deal with the 'complicated' aspect in interesting ways, like exploring their different personalities and the supernatural elements that affect their relationship.
Another excellent fanfiction is 'Heaven's Gatekeepers'. This one plays with the idea of their roles in the grand scheme of things in the Supernatural universe. It has a great plot that weaves in and out of canon events, and the way it portrays Dean and Castiel's connection is both unique and captivating.
Well, 'The Angel and the Hunter' is also a great Castiel fanfic. It not only shows Castiel's loyalty to Dean but also his struggle with his angelic nature in the human world. The way the author portrays Castiel's internal conflicts and his growth throughout the story is truly remarkable. It's a long and detailed fanfic that's well worth the read.
There's also 'Wings and Hunters'. This one is unique as it focuses on a different aspect of their relationship, almost like a what - if scenario. It imagines a world where their connection is tested in ways that are both exciting and heart - wrenching. The story has a great flow and the descriptions are vivid.
One common theme is Castiel's struggle with his angelic nature. He often has to balance his loyalty to heaven and his newfound connections with humans.