My situation is similar - Went from fully hearing to completely deaf overnight, and have made the decision to basically go 100% voice off. From the moment I became deaf, I've hated not knowing how I sound when I speak, especially since my voice has definitely changed. I am only know just learning ASL, but have basically relied on a combination of lip reading, pen/paper, and text messaging. It's hard to explain to people who aren't used to it, but my family and friends have adapted well enough and it just feels more natural for me. Co workers have been a little more difficult to deal with, but they've gotten used to it also.
I think everyone has to do what works for them, and for me, this is the best option.
-Lauren