Glass battleaxe!
It is my favorite. I mostly use bows and axes, never swords, so I guess that one is just my favorite because of the pretty colors and shapes. Skyforge stuff is nice though. As for bow aesthetics, I like the plain ol' hunting bow, or imperial bow. I use an imperial bow of scorching in-game.
I also like the colors of dwarven weapons, but I think the shapes and styles of them are atrocious.
Orcish and ebony daggers are my favorite 1H weapons. lol. But my favorite looking weapon overall is definitely still the glass battleaxe.