Favourite song qualities/structures...

[Ermz]

I seem to find songs with a rhythmic part and melody line playing over it the most memorable...

Examples:
Opeth - Moonlapse Vertigo
Opeth - The Drapery Falls
Meshuggah - Elastic
In Flames - Artifacts of the Black Rain

how about you?

 

[Gandalf]

I like it when songs have a certain influence to them, and are touched up by the style of the band. I love it also when the song switches to and from acoustic, like in "Bleak"