As someone who works in entertainment (broadcasting) maybe I can help shed some light on this. When you work in entertainment (let's be honest, that's what Twitch is) it is very very important you actually want to be there. When I turn on my microphone I want to be there, I'm genuinely excited to talk to my audience and I make a conscious effort to smile when I speak. When you're genuinely enjoying what you're doing, you're going to be happy. When you're happy, people will tend to gravitate to you. Regardless of how you feel about their personalities or their gameplay, I can tell you that both Broman and Gothalion are really good at this.