Was this through your GP/the NHS? I'm jealous, all mine cared about was 'the diet plate' and how much of things I should be eating. Needless to say, I cancelled the 2nd appointment, as the previous 10mins one was a waste of time.
Although you say nutritionist - is she a dietician AND nutritionist? Maybe that's why she's showing understanding of how things work, and working with you and your lifestyle. I saw one years ago (private, not NHS), and she was fantastic too. I'm saving up for another appointment, as would be a lot more use than the NHS dietician!