I haven't been to many concerts, but here's what I've seen.
Amon Amarth, Ensiferum, Belphegor, The Absence - October 15th, 2008
Summer Slaughter - July 15th, 2009
Devildriver, Suffocation, Goatwhore, Thy Will Be Done - February 2nd, 2010
Paganfest (Turisas, Alestorm, Arkona, Ex Deo, Protokult) - April 2nd, 2012
Sepultura, Death Angel, Krisiun, Havok - April 23rd, 2012
Iron Maiden, Alice Cooper - July 13th, 2012
Eluveitie, Wintersun, Varg - December 13th, 2012