At our program, all residents are assigned a specific question to ask the interviewee. Responses are scored, and then all the scores are added up for all the different questions for each interviewee. At the end, it's rather apparent when there are usually 2 or 3 people everyone really likes, and there are usually 2-3 people people REALLY don't like/think is odd.
I should clarify that we only give a score based on the answer to the question (and not whether or not we like the person). However, we can then add comments like, "oh so and so showed up late all the time...isn't really interested...is just into this for the lifestyle...always wanted to leave early...etc." Those comments go into the "soft scoring" of interviewees after a preliminary table is made up of all the applicants and their scores for each question.