Yes, most of the Deaf people do use alot of facial expressions and I do too...
When I became Deaf at the age of 5, I wasn't able to hear sounds or voices...When my parents were mad at something that I did, I would read their lips and facial expressions to know what they were feeling inside and etc since I am unable to hear their voices....
When Deaf people get together with others , they use alot of different facial expressions when they tell a story, or if something happened in their lives or something good etc....It helps others to understand them more, I know some hearing people don't understand why we do that, it's more of a way we can't hear and it does show alot from using different facial expressions and mostly is how some of us are raised by learning when we look at our parents and other hearing people by reading their lips and their facial expressions , It helps alot
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Yes, the deaf commonly use them to express their feelings and it's important to me but I can't speak for others....