The ships I find totally impossible? The non-non-con (?) Hermione or Ginny/Lord Voldemort ones. Ginny and Tom, I could see, but even then it's a bit of a stretch...oh, and Dumbledore/anyone, and Hagrid/Anyone but Mdme. Olympe...

Most believable? As In what I think will happen to the books? Then Ron/Hermione and Ginny/Harry. It's so blahvanillaboring but it's coming. I think...

Thank goodness for fanfic...