Generally listen to all sorts of metal including power, doom, death, black, Viking, and so on, though I enjoy the power/trad stuff the most.
Favorite bands, in some sort of order:
Solitude Aeturnus
Lost Horizon
Blind Guardian
Iron Maiden
Running Wild
Death
Falconer
Manticora
Iced Earth
Bathory (Viking stuff)
Helloween
Onward
Immortal
yadda yadda yadda.....