Lately I've been thinking about the different styles of music and why they are what they are. So let's go through and dissect them into their different parts.
Let's start out with one of the most controversial ones of the last century, rap music. Broken down rap music is mostly a simple beat that makes you want to dance with very long complex lyrics that rhyme. The lyrics seem to be the most important part or it is what the artist wants you to focus on usually. The lyrics are mainly just the artist talking with emotion in their voice instead of singing. Now if you made the instrumental part more complex it would take away from the lyrics since a singer would have a wickedly hard time fluctuating their voice that fast with how much they have to say. Rap music has been given a bad rap in the past due to artist putting in vulgar messages that glorify being in a gang and being addicted to sex. Also there has been a lot of subpar rap that becomes popular just because it has a good beat and is easy to dance to making it appealing to drunk people. True rap will focus on the message and have a good beat and will leave you with know what point the artist was trying to get across to the listener.
Classical music is not as popular anymore, it is rare to even hear it on the radio in my area now. Classical music is only instrumental with the full scale of notes and a plethora of instruments. Some of it makes you want to get up and dance in a different way than rap music, in a more swaying motion compared to a jumping motion. The slower tempo classical is sometimes sung with. This is called Opera and seems to be enjoyed by very few people in the United States. As far as I know from what the TV tells me it is popular in Europe. Now as far as the faster tempo classical music, imagine someone trying to sing to that. It would sound horrendous and the person would have a very difficult time fluctuating their voice to it. Most of the famous classical music is pre-1900 (Mozart, Bach, Brahms), but some newer classical does become popular. The scores from movies become CD soundtracks and they also sometimes can be heard being played by symphonies in concert halls. Classical music my become less and less heard, but it will never fade out completely.
Rock Music is very popular and we hear it every day on the radio, in stores, and in advertisements. Rock music is a simpler form of music than classical. It is usually a mix of electric guitar, electric bass, drums, keyboard, and a singer. The music is a harmony of these instruments. In older rock music they had some guitar solos where just the guitar would play by itself changing many chords in more of a classical type of style(don't we all miss that?). The electric instruments give and "edge" to the music. The lyrics play an equal part as the instrumental in rock music. They are sung rather than talked as in rap music. They lyrics are much shorter, but still can convey a message in the song that the artist wants people to hear. Rock music seems to be staying close to the top of most popular music types and I believe it will stay there.
Most other music falls somewhere in between these two or mixes them. Swing and Ska music is rap music with some more instruments here and there. Country is pretty much Rock music with more acoustic instruments and someone with a southern accent to their voice. Pop music is a rap music beat with more of a singing voice and shorter lyrics and is the most popular (as far as what the TV tells me). Heavy metal is a more edgier form of rock music where the instruments are played faster and with distortion.
Well, that is my take on the different types of music and I hope it helps you better understand why different music is the way it is and gives you a better understanding of why people like different music.