For me there is only one kind of music for forging, METAL!
Angra
Kamelot
Nightwish
Disturbed
Dragonforce
Dream Theater
Edguy
Epica
Firewind
Nocturnal Rites
Rammstein
Rhapsody
Sonata Arctica
and of course the namesake of our chosen media Iron Maiden.
Life is short, Love what you do!