I agree with the breathing into the mike. Just back off a bit, very annoying.
And there is one person that I have noticed on a couple of different streams. I have no idea who it is. Every time a player makes a nice play, the only thing they say is "WOW".
It wouldn't be all that bad except that it is in the absolute most monotone drone voice you could ever imagine. By drone and monotone, I mean it sounds like they have a sinus block or they are pinching their nose closed.
Sometimes it is one Wow after another. Wow, wow wow.
If you want to hear what this sounds like exactly, pinch your nose with your fingers and say, WOW.
All I have to say is, WOW!
I think that was "kybill9" (Fast Lenny's co-commentator).
Eric