I just feel some people don't see that Dorian's very much inclined with a lot of the tropes associated with KISA, but don't see him as such because he's a mage. Which as I've managed seems rather superficial. The man embodies the spirit if not the iconography of the trope.
Well, that's the thing. It's a trope, so there's room to play with it. There's no single set of traits that a KISA needs to have. So, some people might look at Dorian and see a KISA. Others don't.
When you look at the characters that we call KISA's in DA (Alistair, Aveline, Cassandra, Sebastian, Cullen, Blackwall - "Blackwall", not Thomas Ranier, if that makes sense), there are some things that they all have in common:
* They are all combat warriors (with the exception of Sebastian, who is ranged, they are all front-line sword and board warriors)
* They are all the "moral" characters. They refrain from excess and indulgences. They aren't the hedonistic drinkers and casual sex group (although several of them have moments where they 'let loose"). And, when it comes to romance, they are all romantic at heart, but terribly unsure of themselves in that realm.
* They all work towards their internal personal noble goals. They are all "defend the poor" types, but none of them are rebels (the closest would be Cassandra, but even her rebellion is controlled and within religious purposes). To me, a KISA is a redeemer, not a rebel. It's the difference between Lawful Good and Chaotic Good. KISA's are lawful.
Dorian doesn't really fit any of those to me. He's pampered nobility. He's cheeky and flirtatious and inappropriate in conversations. He not only fears temptation (which could be a KISA quality), but gives into it. He's a Bacchanal. He likes excess and drinking and casual sex. And, while he's certainly striving to redeem his homeland, his approach is a more rebellious one. He's not one that I would call "Lawful" in his alignment. And, again, he's a scholarly mage. Not a knight enchanter. Not a battle mage. He's a support class, really.
So, to me, that's the fundamental difference. It's subjective, obviously, so you might not agree. But to me, that list of KISA characters all have one other thing in common: they are all straight. In fact, outside of Morrigan and Solas, they are all of the straight LI's (discounting Aveline, obviously). I, and the other supporters of the thread, would just like to see that type of character be gay in the next game. That's all. Hope that makes sense.