Types of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. 1  Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.
System of a Down's music has variously been termed alternative metal, nu metal, hard rock, progressive metal, thrash metal, art rock and avant-garde metal.
1. Emo is short for emotive hardcore, a style of post-hardcore music. It has deep lyrics, sloppy riffs, etc. Most people think of My Chemical Romance or Black Veil Brides as emo music, but that is actually emo-pop. Rites of Spring, Sunny Day Real Estate, and Secondhand Serenade are real emo. 2. Emo is a style. Most emo people wear band tees, skinny jeans, studded belts, Converse, and choppy hair.