I've had a bit of luck finding youtubers/twitch streamers who are content to let some dead air go by if they don't have anything important to say, and definitely don't do any yelling or screaming. It's a real nice change.
Partially I'm just making this post to share the few I've been watching the most:
Jagged Appliance, a Supreme Commander player and caster.
Growling Sidewinder, a DCS pilot who goes into detail about dogfighting and BVR fighter jet tactics.
Tasteless, a Starcraft caster who plays Brood War and chess in the Korean timezone.
you say "until he has a big project" like he hasn't had the carnival, the thanksgiving dinner, the death stream, the Twitch Plays Jerma stream, the nickelodeon slime stream, the green screen stream, the easy bake stream, so on and so forth
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i would say the slime stream, green screen, and easy bake were all pretty high prod. value stuff - they were all in a studio, and one even had a handful of paid actors