I'll address the comments about the tone of the stream once, and once only.
There are players in some of these in-houses that I have been playing games with for a while now, and these are the players that I tease on my stream. People like anbokr, neki, freakinchair, sanjay, etc. You can usually tell by the giggles and the sassy comments who the joking is about. It's nothing personal or serious, just the regular trashtalk that I had been doling out when I was playing next to them.
On to the non-joking, analytical portion of my casting. I try my best to big up any and all positive play that I see, and I feel like I have. Let's be honest, when games are being lost, you point out why they're being lost. When players make mistakes, I point it out, and follow it up with constructive criticism about what they could've done better. There are going to be a lot of mistakes, it's the nature of the game, especially given the level of play. It's not a matter of real talk or anything like that. I have my style and personality, and I'm never going to Bob Costas or TobiWan, and I don't want to be.