No festivals, but here is an incomplete list of bands I've seen live over the years: Revenge, Mayhem, Tribulation, In Solitude, Nile, Skinless, Cryptopsy, Nargaroth, Watain x 3, Incantation, Funerus, Nefastus Dies x 7, Wolven Ancestry x 7 or 8, Elevator 22 x 10+, Martyr, Unmerciful, Quo Vadis, Neuraxis, Beneath The Massacre, Panzerfaust x 6 or 7, Rotting Christ, Peste Noire, Inquisition, Macabre x 2, SNFU, Deathmarch, Divinity Devoured, Eclipse Eternal x 6 or 7, Hellacaust x 3, Empyrean Plague, Will of the Ancients x 6 or 7, Hellmass, Visions of the Night x 4, Senate, Spewgore x 5, Crucifist x 2, Demontage, Estuary, Lapidate, 1349 x 2, Goatwhore x 3, Obituary x 2, Averse Sefira, Nachtmystium x 2, Marduk, Merrimack, Wolves in the Throne Room x 2, Thrones, Hank III, Toxic Holocaust, Municipal Waste, Behemoth, At the Gates... there are many others, but I'm half asleep and can't think of them right now.