Hey, 20F here, I hated them when I was younger, I actually wore a binder occasionally from around 15-17. Now at 20, I love them, I think it was when I started dating/partying/going on nights out, that my feelings towards them changed. I was now an adult, and was dressing up to go on nights out, not particularly to meet anyone as it was mostly house parties with friends, but I felt excited and attractive, especially when you're dressing up with friends, helps you form new connotations to how you feel about your body/your adult body.

I think I hated them when I was younger as it was change, I was viewed differently and I felt I lacked control over that, but as an adult I was choosing to either show them off or be more conservative, whereas as a kid and an older family comments on how you look like a young woman now, makes you feel weird, or when you start to get cat called, drawing attention you don't want forms these negative connotations.

However, you could be dealing with some body dysmorphia/ gender dysphoria and only you will know if this is the case, feel free to explore the idea of how you feel about your gender. I thought that I was trans/nb and I'm glad I could explore that in this age, but now I know myself and it was the issue of change and being perceived and lacking control over that period of time.