Most Helpful Guy
Different camera lenses have different angles which distort the shape of things, and depending on where you are in the photo and how close to the camera you are it can distort in different ways. Also the lighting makes a huge difference, the lighting in photos can often make people look worse unless it was set intentionally. Consider actual photo studio lighting, they set up reflectors and shit to make sure the lighting is perfect.
Plus you can't see your mannerisms in photos and they only show you from one angle at a time.
I'm also one of those people :)
Most Helpful Girl
i would take that as a compliment...
maybe your photos are not that professional to catch every single thing you have special...
in person the guy sees the character, the body language, the whole package and is very nice that they appreciate it and say it as a compliment :)