After seeing Pippa play Deus Ex, YIIK, and Class of 09, I think Pippa is the worst streamer to go to for any story driven game. She just tangents and doesn't even pay attention to anything that's actually happening to the game. She really shines when playing something like Holocure where she has to pay attention to what's happening in the game, but her tangents aren't jarring because there isn't a story in the game for her to just ignore.
I write all this out, but then I remember that her Chilla's Art stuff is also good. But I think that only works because she lets herself get immersed in the game, probably because of the horror element.