I think I get it though, At least the part that's about me.
It's probly the reason many people who only know me online think I'm an extrovert. Because I "require a lot of stimulation in general." Like Hmm called it "e-outgoing." But people who know me in person wouldn't describe me that way, because I'm not outgoing in the external world, and seek most of my stimulation in quieter ways. I'm a blabbermouth when I get going, but it's around people that I know or a smaller, more manageable environment. I don't do well in large groups or situations where I have to be proactive about going and introducing myself to people.