The cutesy gentle giantess + tiny bf stuff is boring.
Personally, I think only the most mentally ill women should have tiny boyfriends because their alphabet soup collection of mental disorders gives them access to an array shrinking powers. The more mentally fucked the girl is, the more powerful her shrinking abilities are.
For example, an unwilling tiny bf has barely survived another of his giant gf's manic episodes, but he has to figure out if breaking up with his troubled gf is going to cause a psychotic break, so he worries that she might shrink his family and friends, teleporting them into her room, and then torturing, crushing, and voring them one by one as revenge for daring to ruin their loving relationship.