Random strangers calling me 'ugly' and other similar things, when walking down the street minding my own business - they can have no clue about my levels of confidence.
Situations such as, at work, being in discussion with male 'Big Boss' and being completely ignored - as if I wasn't there - zero eye contact, in favour of pretty women.
Not getting served in pubs, shops etc. in favour of pretty women.
Never getting 'chatted up' when I was young, while all my friends were.
I don't mean to be rude, but I have heard all the stuff about personality, confidence etc. a thousand times, also the Roald Dahl guff about being beautiful inside, and it frankly annoys me when attractive or even average-looking women blithely deny the experiences of unattractive women.
I don't fit the stereotype of under-confident and I don't lack smiles either - I'm always the person beaming away in photographs (I've never minded being photographed, I accept my looks, it's others who don't).
But, now I'm middle aged it no longer matters, everyone is sagging and bagging around me, even if they think botox etc. is helping (spoiler - it doesn't, it just tells the world you mind about ageing) - I am part of the blessedly amorphous mass of middle-aged women and it's great.