Ive been here for a month and have seen enough of similar/cliche captions to make me sick, they bassicaly fallow one of 3 patterns
A OMIGOSH, i shouldnt have done that ohwell atleast im cute
B offer bland dialoug or blang description, often explaining nothing of the transformation, leaving out many creative ways for it to happen
C pitcures mood dosent match or fit with the description or mood setting. (IE oh em Gee i am now a girl and pissed but i better blush and smile and instantly wear female clothing for no reason)
so try to come up with something new and fresh, look in the archives and see if your work has been done before before you submit it.