Would it be possible to have the app (or the campaign) remember whether audio and video were turned off last time it was opened? We don't use them in our campaigns (text only is our style), and it's cumbersome to have to go in to settings to disable them each time we load the app.
Most of us are also on netbooks, so it would be fantastic if it could also remember our choice for the size of icons next to player names. (There's this whole dance we have to do on opening Roll20: "Open--oh shit, video--disable video, disable audio too, crap the avatars are covering half the map, disable that too--whew. Now we can play." It's just annoying enough for my players to resent it when I ask them to step into Roll20 from our usual chat program, despite all the other awesome features.)