This was done on a tablet with your fingers!? Your fingers are ridiculously talented. I wish I can hate you, but this picture is too cute and is quickly draining me of my wrath while I forcefully build it up. Lovely work there~
I actually agree with you. It's all the craze around deviantart but for some reason it dasn't seem right to me. The animation styles are different, the universes are different, timeline is different, animators and different, she is a girl and he is supposed to be a spirit, their powers manifest differently too. Seems to clash.
Not all the reasons but some of the main ones: 1) Ice! Come on. 2) He's all about fun and she's quite proper. 3) Jack always wanted to be noticed whilst Elsa just wanted to hide away/be alone. 4) Jack: "Sorry, all I can do is keep you cold." (Very paraphrased but he said that to Baby Tooth when they fell inside the chasm.) | Elsa: "The cold never bothered me anyway."
So I guess it's the fact that they have similarities and parallels and are opposites as well that make people want to ship them. That might not be enough for some people but shippers are shippers. ^^