I don't doubt your friends advice but when it comes to photographic theory, the best people to get advice about your work is from actual photographers or teachers of photography. A lot of people will appreciate photography for mostly the aesthetic only.
I can show my friends and they wouldn't go into detail as much as my fellow photography friends or my lecturers.
If you have those kind of people around. But if your average joe can see flaws in your photos, imagine what the actual photogs and teachers will say. They would have a field day on a single photo.