SebHawke isn't even my ship, but @joufancyhuh 's The Pigeon & The Prince series is unforgivably underrated and you should check it out.
Really, I'm ashamed I didn't post this recommendation weeks ago, because such a wonderful writer (and outstanding friend) deserves recognition and support.
Like tbh, despite his yummy voice and pretty face, Sebastian Vael always rubbed me the wrong way— but these fics caused me to do a complete 180°. They're beautifully written and immersive, and they show Sebastian in a much more relatable light without playing up the whole "Prince Charming" angle.
Even if you're not at all into SebHawke, for the love of all that's holy, at least read Ashes to Ashes. It's amazing, and not at all what you'd expect. It's set pre DA2, pre Lothering, and before Sebastian joins the Chantry — So you don't get any conflicting 'Champion of Kirkwall' feelings already previously established in your subconscious, and get to experience them outside of the usual in-game character dynamic. It's honestly one of my favorite fics I've ever read.
Okay, so, in summation: Go read Ashes to Ashes and the rest of The Pigeon & The Prince series, and give @joufancyhuh the praise and support she deserves. She's an amazing writer, and even more amazing friend, and I'm lucky to have her ❤️