Well, I know an ESFP who is quite taciturn... who'd have thought it eh? He's in his 60's now, though a very young sort since he never had kids and kept very fit, he's fitter than I am at half his age, he does a lot of socializing, he's always busy busy busy, has zillions of friends and yet... yet... he never really talks to any of them! Very odd...
I know an INTP though, who never shuts the fuck up. I mean he literally NEVER shuts up. He's a total bore as well. Just rambles on and on about his pet subject (geology, like anyone relates!!). And he always talks in big long words and fancy phrases - not that I've anything against a good vocabulary you understand, it's just that he talks as if he's reading from a fantasy novel if you know what I mean? Like someone says "dude, this sauce is ace!" and I say "yeah it's not too sweet like the other brand" and he'll say "yes, I adore the way it unfolds upon the tongue like a bud opening to the touch of a bee's kiss in June" or something.
I also know an ISTJ who totally dominates all roleplaying games and doesn't let anyone else talk, ever.
There was a long phase in my life during which I didn't say much, mainly because my social skills were for shit and I didn't know how to get along in a group so I just stayed quiet since usually when I said anything it was wrong. To this day I often sorta set myself a mission before a particular social encounter, to keep my mouth shut and say as little as possible. It's harder now though, gets harder and harder as time goes on... the drive to externalize, the things that come into my head, the questions that I NEED to ask... if I'm in a situation where there are people around and for some reason talking is not permitted or just talking BY ME is either not permitted or just not advisable (like I don't have anything to add, they're talking about shit I don't relate to) I leave the place feeling exceedingly bottled up, frustrated and just soooo down. The only antidote is to invite my ISTP friend around and over a few beers we'll talk and rant and laugh and check stuff out [details deleted lol] and by 3am I feel soooo much better!
Although I'm very talkative, I HATE monologuing. Hate it, passionately. I only talk because I want the other person to talk back. I love conversations. I don't just love the sound of my own voice and I'm not trying to get attention or impress people like these guys do. I talk because I want to hear YOU talk back, I'm interested in you.