Why Am I Not Photogenic?

I look in the mirror and I'm fairly happy with what I see. Given the (no pain) option I'd change a couple of things and I know that losing more weight will change the shape of my body and my face even more so that's a work in progress. But why does the mirror version of me look so different from the camera version of me?

I look at old pictures of myself - the time before I realised about looks, style, angles... I'm a fairly good-looking kid; I'm happy (aren't we all on photographs from the '70s and '80s - none of that 'here's my kid in a dilemma' type Facebook upload)... it's the time before self-conciousness.

I've tried the smiling with my mouth open/closed

I've tried the "drop a hip" method

I've tried turning to the side

I've tried different hair cuts and different make-up looks
I've even considered using a company like Showtime Photo Booth who offer video booth hire in London to see if that makes a difference

I know it's only me that cares and no-one else cares but there's so few photos of me that I'd like at least one or two where I look GOOOOOOOD, y'know? I want to document my life whether that be on or offline. So often I'm the one behind the camera and I still haven't found the best selfie angle and I'm not so sure I'm *that* narcissistic.

Is it true that there are some people just aren't photogenic or can I find my good side somehow? Is it because I've been so unhappy with my body shape for so long that it's affected my confidence? Is the image I see in the mirror so different from what you see?

Edited to add: When I shared this on Facebook it sparked a very interesting conversation - have a read here.