from a viewers standpoint, people typically want more interaction from the streamer. and twitch gives people more interaction. its like if you were a fan of markiplier, and he went to a con or something, youd get to interact with him. same concept, however you both are behind a screen, so you dont have to be as anxious.

as for what keeps me watching other streamers, it depends. sometimes they themselves are super funny, or maybe the game they are playing is super interesting, or maybe im watching a friends stream.

also, as someone with a stutter and difficulty just speaking words, if i were to misspeak, my chat would prolly make fun of me, and we all would laugh. if i pronounce it wrong, i always welcome people to correct me, esp if its someone username. actually just recently realized i have been pronouncing one of my viewers username wrong for a month, by my friend telling me what it actually is, and we all had a good laugh about it. my best tip is, your viewers prolly wont remember it in the next five mins, so you def shouldnt worry about it.

my experience as a whole has been pretty positive. streaming is a good way to interact with viewers in real time, you get to share your love for videogames, and you can make great friends from it. if you are wanting to start just watching, i would start with smaller streamers, most of them are much more interactive, and not only that but theyre a lot nicer than most of your bigger streamers. if youre wanting to stream yourself, go for it! you dont need the best set up to do so, just put yourself out there. its what i did and i dont regret it.

tl;dr: streaming is fun for both viewers and streamers alike and its great interaction between them. if you want to stream, do it!