What a lovely thread OP!
And everyone posting has taken the time to think about and share the impact that compliments have which to me makes you all worthy of one 
I’m really lucky because I get compliments fairly regularly, sometimes about my cake baking, about still being trim at 50+ and also my grey curly hair which happens to look like I’ve put highlights in the front. I try to be polite and just say thank you rather than be dismissive, a sign of a healthier self esteem now I hope.
In fairness, I work in a female dominated environment where we all encourage and promote body positivity so I give out lots too. They have to be genuine, I can’t do fake.
The ones I value most though are those which relate to how well mannered and pleasant my DCs have turned out (despite me having awful parents myself) and in turn, my GCs.