The cast pitches multiple characters to BLeeM per campaign, and he has a lot of say. I don't think it's entirely her fault she has played them. I am pretty sure in USC Misty wasn't her first pitch. D20 is a produced show as much as it is DND. She also has nicer characters like in starstuck and sleeping city 2.
Anyway I like all of them. I wish Zach and Ally spoke up more, but their styles are a little more reserved. And I wish Emily didn't have such long conversations. Like in Sleeping City 2 there was a scene of her deciding to go somewhere, and it took 10 minutes of real time going back and forth in her decision. It's fine to do in a real play setting but it's crazy boring for me. The cast did that in the most recent ep too discussing all the options, so I don't think it's just an Emily thing, something I noticed more with her??
Pete from USC is my fav. But I don't think I dislike any character, they are all in second place.