Well, I don't really search for the games themselves as I'm willing to see anything new and interesting. Then again, I do for some reason watch the Food and Bob Ross streams way more than I should. I also sometimes go into the creative section and watch people draw stuff or make something interesting, or play an instrument. However, I do follow a few people that are entertaining to watch like Vinesauce and Cirno_tv, with the former being more of a normie jabroni while the latter feels like he wouldn't be too much of a stranger on this site, even if I have noticed some normie tendencies.
Being in twitch chat is an interesting experience as well. If the right people and content are there, it just becomes really fun, especially if you're knowledgeable about what is being played. Also, depending on who you're watching, you can use the BTTV/FrankerZ emotes to spam cute 2D girl emotes, even if they won't be seen all the time because of how it works, but people should still be able to know, if they know, that phrases like WanWan is the dancing Momiji .gif.