I am a man. I was physical with two girls only. Both of them have big boobs. One of them doesn't like it much when I sucked her boobs. She neither liked it nor disliked it. But If I contibued this for a long she would get restless than why I am wasting time on one part only.
Now, My current gf. She just loved when I suck her breast. She just go mad. And she would ask me to hold her breast tightly and bite it (Opposite to the first one).... she just love whatever I do to her breast.
One more funny thing!! My gf now knows that I have extra sensitive nipples... so she tickles me by touching them or will pretend that she would suck them which make me even more ticklish. So I can completely understand that WHY some women doesn't like to be sucked.