I have a strong habit of "autocompleting" people's thoughts in my head before they're done saying them. I'm only right maybe ~60% of the time, but it comes with a strong urge to interrupt them and let them know where I think they're going. This is especially true if I can tell that it will take them multiple sentences to finish their thought. It does not come from a place of "you're wasting my time, I get it, jeez", but more from a "I understand the point you're making and I am eager to hear the next thing you have to share."

What I've noticed is that my habit of interruption is received wildly differently by different kinds of people. It drives some people absolutely crazy, and in these settings I've learned to be a little more mindful and try to restrain myself from interjecting so frequently. However, for other people, it works wonderfully and we'll get into a really fast-moving conversation where less redundant information is shared.

My theory is that two well-intentioned interrupters can have a pleasant conversation, and two well-intentioned waiters can have a pleasant conversation, but any pairing of an interrupter and a waiter will be disastrous unless both are very mindful of how they participate in the conversation.