lol tl;dr post here. :[
This is a rather capricious question for me since I can be very outward and social one minute yet reserved and inhibited in another; it really depends on what my surroundings appear to be, and from them I can determine whether its safe to for me to act outside my barrier of discretion. In high school, it always seemed like I was a girl destined to be landed into either amusing and/or annoying situations with many rude and narrow-minded classmates, mainly boys who tried passing snide comments or expressing infatuation through folly (which got me in trouble on a few occasions.) It's made me keep to myself a lot of the time. Then I kept to my group of friends I made not long after, and I was never afraid of opening up to them as best as my personality could handle; that has never been an issue. We managed to get ourselves in quite a lot of hilarious situations and it's more or less brought me out of the shell I closed myself up in prior to meeting them.
Now that I'm in college, I keep in touch with a great deal of my classmates and even those back in high school. I have to say, I've learned a lot from all of them and it's greatly impacted on my will to be sociable. Like I've said already, it really just depends on my surroundings and it's usually by instinct that I can determine whether it's fine for me to be expressive or reserved. When I'm talking with someone I'm not too familiar with, then I'd probably tone down on a few areas. If someone is actually portraying themselves to me to greater extent, then of course I'd follow that action. I used to be very uncertain about the way I should act around others and it led me to being horribly cautious about the whole thing. Eventually I just started not to care so much and just act casual, it seemed that others liked it when I did. I'm very close with my neighbours and I get along pretty well with other people in this neighbourhood, so I'd say I haven't as much of an issue of being social outside as I have had in the past.
Online, I'm pretty much friendly with everyone. No matter who you are and what role you play on these forums or anywhere else on the internet, I am not afraid to approach you at all to say as much as a simple "Hello!". PC's a pretty good example of this; ever since 2005 I've gotten quite a great deal of friends and the reason for that is divided into a fair share of "They approached me and then we became friends." and "I approached them and we became friends." I don't regret this whatsoever since I'm pretty darn grateful for the friends that I have at the moment. And I know had I went about my own business without actually confronting anyone with some friendly chatter, then I probably wouldn't have been as happy as I am at the moment. So I'd say my social skills have helped out quite a lot here.
To sum this up, I can be a pretty social person when I want to be. And I certainly want to be someone whom anyone can approach for even casual chit-chat. At the moment I'm quite content with how social I am with other people both online and offline, and so far it hasn't proven itself to be much of a problem at all.