I have never heard voices outside my head but sometimes the voices IN my head sounded a lot like a whisper, like a hissing coming from the outside...which was scary because it felt like the devil was lurking by my ear! Not good. But my main brain-problem was and sometimes still is, racing thoughts, although nowhere as bad as it was...It used to make me think I will actually either go mad with no turning back, or that my brain would give up on me and bye bye SadRobot! But quetiapine has really helped me on that, and it helped with my anxiety as well...

About putting on weight, if you stay on a low dose, under 200mg, it shouldn't cause a problem, and if it does, it will be only until you adjust to it...So maybe be aware of that in the first few weeks and if it does increase your appetite, always opt for healthier snacks - all the delicious but nasty little treats we all love are addictive, so it's harder to give them up even when the cause for the cravings isn't there any more..!
Also, even though some doctors won't admit it, some of these meds do slow down your metabolism...not greatly, but they do...So there is an extra reason to exercise! But I would say find some sort of exercise you enjoy, there is no point in torturing yourself in the gym if you hate it..(I hate the gym with a fiery, undying passion.. :P )

End of long post! Keep us posted and take care :-)