A dedicated software engineer who can be very happy to help you. I’ve experienced developers who carry on an external monologue. I’ve found zero correlation between that personality quirk and a person’s programming chops or a person’s ability to contribute. I can generally abide quirky behavior, particularly if the person is humble, eager to improve, and has a sense of humor. What I can’t abide are self-assured asshats. I can’t abide cocky developers who condemn their teammate for a personality quirk and then somehow conflate that with a lack of programming chops.