How long should a phone interview answer be?
The right length for interview answers is 30 seconds to 2 minutes for basic questions, and up to 3 or 3.5 minutes for behavioral questions. The answers to simple factual questions should be the shortest.
Is a 25 minute phone interview good?
Unless an emergency came up and the interviewer explained the situation, it's usually a bad sign if an interview is cut short and doesn't go for the fully allotted time. Sometimes, initial phone interviews or video interviews are brief, but at minimum, I'd expect them to last for 25-30 minutes.
Is it good if the interviewer talks a lot?
The more the interviewer talks about what is going on in their company and how you will fit in, the better. It means they are selling it to you and potentially see you as the answer to what they want.