I played a pug with griff and I remember him being super loud and annoying, which led me to consider suicide several times throughout those thirty minutes
Just chatting to him in mumble is enjoyable, however. He's really good at this game. I'm sure he's not as obnoxious in scrims as he was in that pug. Unfortunately my only in-game experience with him was in that pug, and it painted a bad image of him in my mind.