I also love puffy nipples. Iv'e noticed more puffy nipples at nudist / topless beaches. Not sure if it's the warm air, sun on them verses the colder air indoors. Maybe it's just more boobs to see at the beach.
One of my grown daughters has puffy nipples. She bent over infront of me couple yrs ago. Her bra was loose enough that I got an eyefull an saw she had puffy nipples. She wasnt even aware of what a great look I got.