This fandom has too many damn adorable pairings. I can't possibly pick any individual one for headcanon. The only ones I dislike are any pairings involving Hans, and crossover pairings (I like Rise of the Guardians, but Jelsa is really getting obnoxious).
That said, this is some of the best Kristanna I've seen. The shading and color is amazing and you've really captured the Disney style while still doing enough to make this your own. As long as the Kristanna that gets produced is of this kind of quality, I definitely agree there should be more Kristanna, even though I'm open to some of the other pairings as well.
I know I loved that the two were bickering one minuet then Anna is saving his life from wolves and snow monsters as he's trying to protect her from them! I thought that was just so cute, funny and believable! I like that Kristoff went back for Anna. He was the first one to put Anna's need first. That just warmed my heart since Anna get so little love in the movie.