I know a couple Dethclok and Arch Enemy songs in C. That low of a tuning would have to be awesome from some Sabbath songs.
It is. A lot of the old Sabbath stuff was in C#. The only downside is that I've gotten so used to the feel of the strings in the low tuning that when I play in standard it feels stiff. Funny story; We played a music festival here in August. One young fellow thought the old Sabbath songs were ours. I told him that they were actually old Black Sabbath songs and he went and purchased all their old stuff. So we inadvertently created a new Sabbath fan.