I actually prefer smaller breasts but as long as they're natural, I like any size. Depends on the woman's body type too. I think petite girls or athletic girls with toned abs look hotter with small or medium size breasts, and curvier girls or girls who just aren't toned at all look hotter with larger breasts. Only breasts that don't do it for me are fake breasts, but it's not a deal breaker. I still might really like the girl for other reasons, like Ember Snow who is probably one of my top 3 favorite pornstars.