There are many types of music genres and they're very easy to get mixed up. A lot of genres are similar while others are completely different, but learning how to tell the difference between them all is quite simple. Each genre has something specific about them that separates them from the other genres. Even then, each genre has a sub-genre which just has a tiny difference from the actual genre. It's still pretty basic to tell which sub-genre goes with which genre.
Everyone has there own kind of music they like to listen to, whether it's country, rap or anything in between. Personally, I like most genres of music, I'll listen to anything. One genre I'm not a huge fan of is country. Most likely because I grew up listening to it, and I eventually grew out of it, but I'll still listen to it occasionally.
One thing that really makes me mad is when someone says that "Screamo" is a genre, when it's not. There are some genres where screams are involved in the music and one genre would be metal. Some genres are similar to metal like, punk rock, except there is more yelling and shouting rather than screaming, and has more of an emphasis on a specific meaning instead of telling a story. While a lot of songs do focus on just one main point, other songs tell a story. For example, Three Days Grace just came out with a song called, Chalk Outline and it's about a bad breakup, that Adam Gontier, lead vocalist, or someone else in the band had recently or a while ago. Also, Avenged Sevenfold came out with their album Nightmare and every song on that CD is about the death of there drummer, The Rev. All songs in every genre have a point or story, you just have to find out what it is.