A runner up for my favorite 2012 'debut album' is, 'In the Noon of the After Day' by Order of the Owl.
I first heard of these lads through one of my favorite DJ/blogger/metal-heads who goes by the moniker of 'The Wicked Lady'. If you're into the Doom/Sludge/Stoner metal scene, do yourself a favor and check out her weekly podcast here.
Anyways, some good ole fashioned dirty sludge metal coming by way of Order of the Owl.
Fav track: 'In the Noon of the After Day'
My Rating: 7 / 10