Going for what I think is actually quite a common standard: I'm quiet around people I don't know but occasionally push myself to make moves to initiate conversation.
I'm easily hurt (my issue and I'm working on it) so I'm reluctant to put myself out in an advertising way as more consistently outgoing people do. However I have noticed that, frankly, outgoing people (at least in this culture) are an exception not a norm. When it comes to talkativeness I have been known in the past to be very verbose and I've picked up the bad habit of my area which is talking very fast.
This can combine to give the effect of talkativeness. However as I've gone on, even in the short time I've been here, I've calmed down a lot and become more accepting of my silences. As a child I was extremely quiet and never engaged with others but getting older I was repeatedly told and had it drilled into me that I needed social skills so I made an effort to be more outgoing.
Now I am as inconsistent as I've come to expect. I can be talkative or alternately very dead air and quiet. I would hazard, given my pre-occupation with honing skills in private, that I am more often quiet than not, however this is probably due to lack of exposure than being introverted.
I don't know if I need people though, I'm often frustrated by them and find a lot of social situations others take for granted as being spiked pits of miscommunication, ridiculous assumed expectations and distance between people. I'm also quite boring with not a great deal to offer outside of the internet, this isn't low self esteem (I'm actually much improved in that area) more a frank appraisal of my current state of being.
On the other hand sometimes socialisation is a decent outlet for conversations you've wanted to had for a while, though I rarely get the chance to discuss a lot of what I think about as it comes across as too odd for the day to day interactions, which is fair (nobody wants an information dump/word spaghetti based on your pet theories and ideas). But absence tends to improve the social interaction I do have, rather than diminish it.
Too much is just.....agony.
Having said all this I sometimes get restless and have moments of very outgoing mania where I dance about, physically bother people and make myself as irritating & loud as possible, something else I'm working on.