I think i go back and forth between talking in a really formal geeky way and talking in a kind of over-exaggerated way, EMPHASIZING a whole BUNCH of words in MY SENTENCES. I think i tend to emphasize things more when i get excited, and actually get really animated(at least it seems so in my mind) with using different tones and stuff. I just don't have a lot of middle ground between those two extremes. My parents say that i've always had a tendency to be on the monotone side most of the time, though. I think my super-expressive-sounding voice is just something i picked up from being around other people.
In a public speaking class i took last year, my teacher said i had a wonderful "conversational" style of speech when speaking in front of people. The way i think of it, though, is that acting really animated in front of a group of people is the same as doing it when talking to people. Either way it's just something i picked up, not something that i naturally do in respone to people.. So the whole thing about learning how to "fake it" in front of people is a non-issue, it's just a matter of turning it "on." Plus, when you're in front on an audience, then i think its' considered good to sort of over-emphasize things.