I know for me, drinking water helps me eat a lot less. And it helps keep me from getting the heart palpitations that I can get with my mitral valve prolapse. I usually drink around 64oz of just water, as well as two-ish cups of coffee or tea. I will certainly be doing more research about water consumption though, concerning how much is too much.
All of you made valid points that I agree with and I think it comes down to this: Everyone has different fluid needs that can't be met with a one-size-fits-all rule like 8 8oz glasses/day.