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.
My favorite type of music ranges from Rap and R&B to Grunge, Punk and Hard Rock. The only genres of music I don't really care for are Country and Death/Screamo Metal. I think it's a good thing to have a wide ranging taste in music since you can listen to artist you otherwise might have missed out on.