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Try in different light sources, especially when wearing makeup.

Especially with LEDs these days which generate very specific wavelengths of light rather than wider spectrums that incandescent bulbs emit, artificial lighting often changes your look. So if you can, try some natural lighting, or use a light source that has both cool and warm LEDs as opposed to one that has just neutral LEDs.

You'll find different color light sources bring out different colors on your face and cell phones try to correct for that, but most don't do a good job and end up making it worse by overemphasizing certain shades, IMHO.

Take 100 pics and delete the worst 99.

use your hands and pose up. standing like a brick makes ya look like a brick, have some fun with it!

if you can't get a shot that your smile looks real try a few with different expressions, and come back to the smile. take a few pics to try and capture it, smiles can be hard to get right

Only experience is for myself, transfemme:

Try both sides of your face. I have found that on a day to day basis my "good side" tends to change.

Also I was always annoyed, that I liked my reflection more than the photos I took until I added a depth of field effect while taking the shot.

Try out different light! Weather I like a pic of me can vastly change depending on light source, intensity and angle.

Definitely hoping to see some helpful advice. Never knew why i HATED photos of me until my egg cracked, so i have very little experience in this area. But now that i actually like pictures of me, its a detriment

I hated photos but the only times I did that was with these kind of angle. Funny walking egg that I was (ᵕ—ᴗ—)