Metallica- One, fade to black, master of puppets, first track in album ride the lightning. The live songs from S & M sound beautiful with the orchestra.
System of a down- Chopsuey, Temper, Toxicity, Cubert, radio/video.
Tool: Schism (I think that is the name.).
Pink floyd: Good bye blue sky.
Nirvana: The man who sold the world (Live), Lithium.
Iron Maiden: Hollowd be thy name.
Eric Clapton: Tears in heaven.
Creed: What if (Nice intro, but the rest of the song is horrible IMO)
Alice in chains: Down in A hole.
Guns and Roses: November Rain, Sweet Child of mine.
Korn: Another Break in the Wall (Parts 1, 2, and 3 into one song, originally performed by Pink Floyid)
This are a few of my favorite intros. My favorite is the intro of system of a down's song, Temper.