Out of boredom I made this list.
Top 10 Metal Intros (with notes on why they're great).
10. Battery - Metallica
Had to include a Metallica song on the list somewhere and this one just stood out to me the most. The first notes you hear when you play Master of Puppets (the album) it sets the mood for what's to come.
9. Black Metal - Venom
The sounds of scratching signal the intro to Venom's second album and the birth of the genre that brought us Bathory, Dimmu Borgir, and Celtic Frost.
8. Into the Coven - Mercyful Fate
A folkish tune? Oh could this possibly be a song of whimsy? NO! This only brings about the Hell of Mercyful Fate and their rise to power! Oh and it got some attention from Tipper Gore THAT'S HOW AWESOME IT IS!
7. Overkill - Motorhead
The fast drumming and quick bassline bring about the ultimate Metal Party Song. Though a short intro it's fast it's loud and it's fun. Just like last early 80s metal was.
6. Phantom of the Opera - Iron Maiden
Riffs on top of Riffs on top of Riffs. This early piece from Di'anno Maiden is what Iron Maiden is all about and is instantly recognized not just by Iron Maiden fans but by Metal fans.
5. Fast as a Shark - Accept
Now here's a fun one. The song starts out with a record of an old Folk German Song, a few seconds in the record scratches and BOOM UDO IS SCREAMING and everything is going off at once. It's just amazing.
4. Iron Man - Black Sabbath
As much as I hate this song, the intro pretty much got me into the band and everyone else into Heavy Metal (it was one of the first songs). So it's a pretty memorable song. The sounds of a mechanical "Iron Man" announcing himself to the world, that's pretty cool.
3. The Moor - Opeth
This intro is something you don't expect, a long peaceful acoustic tune. But once it's over it kicks into an amazing Opeth song that just blows your mind and expectations.
2. Painkiller - Judas Priest
NUT PUNCH! Holy hell what an intro. This beginning is nuts with drums all over the place and once the Guitar Riff kicks in... hold on to your balls again because they're going to get fucked.
1. Am I Evil? - Diamond Head
I want to kiss the man who thought of this intro riff. It's just... beautiful. The best Metal Intro of all time and most people think Metallica made the song. What a world we live in. Either way this intro oozes amazing. So go listen now (it's also a good song).