They are all beautiful. My wife has 36d, fwb 36dd and fb 34b. my fb nipples are so sensitive she can cum, my fwb when they are played with as I am eating her makes her wet and a more powerful orgasm. My wife it doesn’t really matter.
I could say for my bf if you want a guys' view. When I and our gfs (we all have small breasts) go obviously braless in public - it makes him super-horny. I mean, we always go braless. But when we wear thin tops or blouses and it's obvious. When people stare at our nipples (and they DO stare). It's a huge turn-on for him (and for me too).