No, his arm is definitely bugged this cannot be right. I just got to skyhold (grudgingly after 20 hours, wasted) and I was right! His arm is definitely NOT supposed to look like that normally, or at least armors without the horn. I only noticed because of the character outfits. The ones that have horns on the right hip instead of the left. His left arm rests normally and his right stretches out, I switched to other outfits, like the formal and his arms are BOTH resting normally. My old saves load up with his arms resting correctly, until I switch armor, so I have no idea how I got this bug, or how to fix it. THAT is why I noticed it yesterday, because it wasn't normal. I do have trials on, but I don't know how that could effect it. I will just have to delete him and play a female, I guess. It is too bad, the Cassandra romance was getting good. every time I pan the camera to his arm and look at it, and I just cannot stand it.
http://imgur.com/a/NeSVk
Here are examples. First to you can clearly see arm placement with defender armor, and vanguard armor. Both are stretched with vanguard that has a horn on the right hip. Then inquisitor outfit with horn on right hip arm, compared to formal outfit with no horn. Right arm is extended with the coat outerwear, and both arms resting normally with formal (how the arms look when I load up old saves). Unfortunately the last two are difficult to see with the bad quality of the shots, but if you look closely you can see same camera angle, right arm stretched out with coat, right arm normal with formal.
I'll wait to delete just in case there actually is a fix, but I would also like to see someone else's human male arms to tell for sure.
Here I downloaded a save file off nexus of a male. He is a rogue, I know, so maybe the arms rest differently because of class. Well I am looking for a warrior save right now, look at my characters arms (second image).
http://imgur.com/a/1u3Iy