As a noble, why did you marry Annora?

If I did it, it would be purely to make Anora's life as miserable as possible.

A perfectly viable option.  

It will probably happen whether you intend it or no, as a Cousland Hero of Ferelden , even if only "king consort," will doubtless command more power and respect than the widow queen. 

Who said I married her? Ehehehe.
Erm Aedan married her for power, since the whole not owning property as a Warden went through one ear and out the other. And she was pretty, so that too.
Castian never considered it, his eyes glued on Leliana. And the Maker as well. Because he's pretty. Hehe.

The Wardens of mine who married her did so because they cared for her. Since both our fathers were Teryns and she talks about how close she was to our mother I like to imagine she and my character knew each other as kids.

Our wardens would get along nicely, for Robert Cousland thought the exact same thing when he married Anora…  (with a side dish of Morrigan though)

 Prince-Consort Aedan Cousland is your official title. She doesn't give you the title of King Consort when you marry her, which sucks. 

Did you fall in love with Anorra at first sight? Yes

Are you simply putting one over on Allistair? Not needed-Alistair puts things over on himself.

Do you believe you will be a much better consort than Allistair? Of course

Are you doing it to save Allistair form an unhappy marriage? Alistair is not the right  one for Anora and he knows it.

Is it that someone needs to temper Annora's zeal, and you know you can do a much better job of that than Allistair? Yes.

Are you just a better leader than Allistair (Annora rules, you lead)? Yes

Are you kidding, do you have any idea how BAD Allistair will be at being king? That's why he'll never be King when Human Noble is option.

Are you simply a better choice? Better a true born noble than a royal bastard? Yes

Is it all about the Power? I mean, as king consort, you can help the Wardens rebuild and prepare for the next blight... Yeah, that's what I meant. Power is good.

Is it to keep your true LI safe? After all, as king consort, commander of the armies, and warden commander of Ferelden, will anyone dare harm your true love, even if she IS an apostate witch of the wilds raising a god baby? Anora is my true LI.

IRL similar example: Prince Philip

The husband of the Queen.

Its weird, because I don't think, Anora has bigger right to the Throne, than Cousland. She was Cailan's wife, she's not a queen, but queen consort... But perhaps, I'm wrong.

By the way, Leliana mentions Cousland as King.
But I found the epilogue in wiki: 
"[...] married Queen Anora in a lavish ceremony six months after her coronation, becoming the prince-consort of Ferelden. Many said that if the two did not end up vying for control of the throne, they would usher in a new golden age not seen since King Calenhad first united the barbarian tribes."

Yes, I think too.

I did not know that.  I thought they were meant to be taken as fact.

Because she's friggin' HOT, dude?!

Anora CLAIMS a lot of things, but has no evidence whatsoever to back them up.