Meh, to me, obsidian was a melty mess of everything that was unfortunate to be nearby, and thus has no real structure, while glass is made from the purest sands that you can get.
Mmm...Pizza.
What is the strongest quest armor? I've been rocking some dark brotherhood stuff and some armor I took from a Stormcloak officer.
Wait, pizza! Placeable tomato sauce! With dough blocks! and cheese! And meat! And peppers! And pineapple!
I'm hungry.