OP title cracks me up. Most of the time I have not much to say at all, unless there's an interesting topic or something immediate and pertinent to discuss. My small talk patience is generally five seconds.
There's a certain ISTP friend and I well, if we start talking it can go on for hours and hours and hours. Only it typically involves some type of movement and/or change of activities and pauses to chill out quietly in-between.
We call it rambling, and will sometimes pause to say "sorry for going on about this or that." "Worse than a couple of chicks."
Oh my god, my father does this all the time. We absolutely can NOT get the man to shut up. He does this captive audience thing when he starts talking about something he really enjoys; the people are clearly giving the "I want to run away!" eyes but he is oblivious. We'll either take him by the arm and literally drag him off or kick him under the table, to which he'll look at us sharply and say "Why did you kick me!?!" in front of everyone, lol.
We tell him what he was doing afterward and he gets kinda pouty.
Hahaha... ISTPs and weird noises... Two of my ENTP friends have tried translating my noises. I would much rather make a noise or gesture than say a common short phrase. It's a waste of energy. Like: "I dunno" is "MrrMRRmrr." .... F it, I can't translate it to text like they can.
I have an inner monologue that sounds strikingly similar to something off Animal Planet.