I mostly don't share about my collection with anyone, I know they wouldn't get it. I have one friend who's like a sister that I've let see it, and she gets that it's just the perfectionist part of me that has to strive to do the best at whatever I put my hand to, even if that means cosmetics. My brother automatically associates anything to do with the beauty industry with being superficial, and placing far too much value on appearances instead of what matters. I honestly, to a degree, took that perspective for a long time, despite my sister being a MAC addict for years. It wasn't until I really realized that it's a form of self expression with a low "barrier to entry" (anyone can do it and have fun with it!) that I started to appreciate it in other forms.
It isn't just about making yourself feel better (or making others feel better), it's about saying "this is who I am, this is what represents me" with one glance, and that's an empowering feeling, to be able to communicate something so personal in such a short span of time.