If I could romance Cullen I'd do so with an elf.
To me the romance between a former templar and a Dalish hunter is the best... two warriors but from very different backgrounds. Different religions, different cultures. Yet somehow love blossoms. Yes I'm a romantic

Ah. So it's a relation between equals, in your case.
Both the Commander and the brave, Dalish hunter have a lot in common. They understand where the other is coming from and can complement each other nicely. It's only a matter of time until they realise it and fall in love. 
But in a couple of fanfics, I've noticed that's not what happens. I may be reading it wrong, but the elf is always kinda fragile, purposefully naive, needing some sort of protection - in a psychological way - or misunderstood, even though she's already in her 30s (I guess).
Idk, this reminds me a lot of angsty teenager stuff. Me against the world, I have special powers, nobody is like me so no one understands me, I am the Chosen One, that sort of self-centered thing.
Sometimes, this is accompanied by the whole damsel-in-distress leitmotif as well.
And I'm just not sure the Commander is the kind of guy who would be, well, comfortable in this kind of unilateral romance, you know?
The man is already in his 30s. He's seen his fair share of horror, had many responsibilities and has had many disappointments. By now, he differs young people from adults. I guess it's a bit strange whenever I read a story where there's this bubbly, needy - sometimes even clingy -, happy-go-along or angsty elf interacting with a guy in his 30s and he manages to keep a straight face or not lose his temper at what he would consider typical childish behaviour, like any man would normally do.
Idk, I'm just voicing my opinion here. None of what I say matters. My intention is not to change anything, just express something that quite frankly puzzles me. For me, people must write what they want to write. It's just odd to see so many people portraying the Quizzie as such a young person, especially because a teenager sees a 30 year old man in a very different fashion than a 30 year old woman. The things a woman in her 30s seek in a man are entirely different than what a teenager does. To a teenager, an older guy is a trophy. But to a woman, it's a companion, a friend and lover. Those are two very distinct views. But like I said, it's just my opinion. 