I'm a Gen X casual gamer, I play video games and mix Trance tracks during the winter half and build campers, go camping and Mix/Play Trance in the bush during the summer half.
I use video games as a type of digital escapism in the wintertime so I can remain sane enough in the summertime to build my camper van/bus and go camping. I guess we all have some need of escaping everyday's reality, so this is how I choose to escape mine.
I stream as a way of engaging in some sort of communication with other gamers. Some times we might be curious about other games and search youtube for live streams to watch actual gameplay before we buy games. If anyone finds my gameplay helpful in their decision of buying a game or not, I'm glad it helped you out one way or the other.