I think the best way of making an album awesome is to make the first track awesome, that way people immediately like what they hear and end up listening to the full thing. Here are some opening tracks that truly succeed in that department. In no order.
I agree with just about every single one on here. Props for 3 and 24. You missed "Capitel 1" by Ulver on the album Bergtatt though. Otherwise amazing list.
Burzum - Det som en gang var
Shining - Ytterligare Ett Steg Närmare Total Jävla Utfrysning
Autopsy - Charred Remains
Suffocation - Liege of Inveracity
Overkill - Coma
burzum - det som en gang var [2]
neurosis - to crawl under one's skin
ulver - i troldskog faren vild
ulcerate - drown within
blut aus nord - end/choir of the dead
converge - the saddest day
fall of efrafa - simulacrum