I love this subject. It has always fascinated me. Have you ever photographed orbs inside? Do you notice that they tend to hover around people, and sometimes take on different shapes?
I have a few inside photographs with orbs around people, and many taken outside around myself, my husband and visitors. It was in a group photograph of family and friends taken outside, that I noticed my first orb over eight years ago and now take hundreds of random flash photographs, with orbs appearing randomly in them. Yes, I agree they are very fascinating - have amazing energy and surprise me with different shapes at times.