The aesthetics are the most important thing. The arrows are fricking green and balck instead of metallic and brown.
Patina my friend, patina. It's bound to happen being left stuck to the back of a rotting corpse for a couple hundred years

Personally I find steal arrows to look like a proper arrow one would use in battle, it has 4 edges !! Do you know what kind of wound that would make ? It would be almost impossible to get the wound it inflects to heal, which would lead to a slow and painful death from infection ( if you didn't land a fatal hit ), not to mention the pain involved when trying to remove it.
When it comes to looks, and what arrow I tend to use most in general, I go with Elven Arrows. It's stylized, but still a "proper" looking arrow. Just a little bit more extravagant. I also tend to use an Elven Bow (or the Nightingale Bow with Ebony Arrows) because I like the eagle motif Elven equipment has.
When I'm actually using something because of stats, I just stick to my Bound Bow. All the power of the Daedric equipment, with none of the weight.
Bound bow is cool and all but I have yet to really mess around with the magic this time round in TES. But even if I did, it's the look of the Daedric arrow that turns me from them. There's no way that arrow would inflict a fatal wound on a person wearing clothing let alone armor, the way the arrow head is designed it wouldn't penetrate very deep. But pulling a bow out of thin air does look pretty badass.
