Interesting, my perspective changed quite a bit during my transition process. I didn't dare admitting to myself and others that I like to have big breasts, because I thought it would invalidate my gender dysphoria. Like it would be some kind of fetish. But after three years on HRT, I still didn't have adult breasts.
So I went to the doctor. In The Netherlands, breast augmentation is only paid for by the medical insurance, if you have no inframammary fold and if your breast glands grew less than 1 cm. Mine were measured and I had both the inframammary fold and more than one cm of growth, so the insurance turned me down. But shortly after that, the dutch government came with a subsidy for breast augmentation for trans women and I just got a budget I can spend in a private clinic!
https://www.dus-i.nl/subsidies/borstprothesen-transvrouwenI now have the freedom to take the breasts I like and I'm finding out that I actually do want large breasts. I just pretended I didn't because I thought my gatekeeper/ psychologist might reject me over it.