I sometimes talk to people online wishing I could let my body speak. I think words do not always describe the thoughts and emotions I am trying to convey.
Extremely important, both body language and face expression. We have talked about this in the past here, there is this doctor that apparently turned reading faces into science. (Edit: Paul Ekman)
The posture also speaks a lot. The way someone walks. I see people walking slumped and bent on the streets and I am wondering why they aren't working on that. Chin up, back straight, the basics. Especially when it comes to women... I mean, woman, high heels aren't sexy if you walk with your knees bent and as if you're passing through a swamp XD