I tend to wear combinations of armor. I very much like the Dawnguard Heavy armor, darker set, with the dark steel pauldrons, and I love the Dawnguard heavy helmet, though I don't use it often because it's pre-enchanted and I can't find one to enchant myself.
If you're not enchanting, you may enjoy that one. The Dawnguard boots and gauntlets aren't anything to write home about, though, so Faendal and I usually end up rocking the heavy armor and a standard steel helmet (no horns) with steel plate boots and gauntlets. I think the Dawnguard helm looks better than standard steel, but I have certain enchantment patterns that require helmet.
The steel plate boots and gauntlets go well with regular steel armor as well, and I prefer the pauldron sets to the vest style.