I try to cry as silently as possible because I don't want anyone to know about it. I cry for stupid reasons a lot of times, especially considering that my life in general is pretty idyllic compared to most other peoples'.
Anyway, when I cry, mostly my shoulders shake up and down. Then I sniffle and make that shuddering/gasping noise.
When I was a child and teenager I used to cry really loudly, like wailing and screaming, which was mostly an attempt to get people to try to comfort me. For some reason, I used to only do it when my mom wasn't around, so I only had my dad to comfort me. My dad never comforted me when I did that - he just came into my room and told me to turn up the TV so he couldn't hear me. Even to this day, he still gets angry with me when I express negative emotions, because he thinks I'm being "illogical". 