The Witcher 2 had some of the best looking, and I'd say most believable looking armor in a fantasy RPG. I loved the way all the clothing and armor was layered. And though armor choices on the player side weren't terribly varied in terms of size and layout, the attention to detail was really something.
Also, I would dare say that game had the most authentic looking leather in any game. Materials looked the part everywhere you went in that game to be honest - such a great looking game.