I like to speak on Skype cos I can hear the voice, and a few people can control their voice. Facial expressions - may be. But voice - harder. I endeavor to do it, especially when I speak to not familiar people to me, or with those, who are not friendly to me. You can guess about emotions of your companion and true feelings. You can hear second sense in their words. BUT! When you chat, many things can be missed. And some people benefit from it. But I don't like it definitely!