Last semester I experimented with voicing for myself. I did for pretty much everything for about a month. Then, I just kind of stopped. It wasn't an active choice, it just happened. I realized how much easier and less stressful my life because when I did that and now I have a very strict "voice off" policy for everything at school. Now no one expects me to speech read or speak and it is a lot better.
I've noticed the same thing happening to me. I think for two reasons in my case. Like you, Jenny, when I have a terp present it is less stressful to use ASL than try to speech read. People expect that you can hear...maybe they'll just speak a little louder to you...if you voice for yourself. The other reason is that people are noticing that I now have a Deaf accent and, while I'm certainly not ashamed of being Deaf, I feel uncomfortable with my voice and volume in some settings. :|