She likes Herbal Essences for the nice scent. I have found that the only shampoo that doesn't leave my hair either greasy or frizzy is John Frieda brunette shine stuff.
I get through a tube of conditioner every third hair wash (waist length thick hair), and shampoo every 6th wash.
DD's seems to last her about 8 weeks. She washes her hair twice as often as I do, too!
But if she asked for John Frieda, I'd get it for her.
I do sometimes buy myself more expensive snacks - but that's because I give them the choice of what crisps and biscuits they choose, and they go for multipacks of crisps and value biscuits whereas I tend to choose a single cake and a pack of cheese lets!
They get the choice, that's the difference. And I wouldn't buy cheaper for them, if I need shoes and so do they, they will get properly fitted, decent shoes - their school shoes are from Clarks and were roughly £39-£45 a pair. My budget for my own winter boots is £20 max.
Their feet are still growing, and mine aren't.
I'm not a martyr to my DC's, but I do believe that it is divisive and borderline abusive to treat your DC's as somehow 'lesser' and not as 'worthy' of nice food etc.
But this is maybe because I was the child that was treated like that, knew how it felt, and don't want my DC's to feel like that.