*looks for my thesis on the incongruities of Ronmione*
i think i lost it in the last PC crash *count yourselves lucky

*
ok so i cant find that mile long post but suffice it to say, to
ME i saw no chemistry between Ron or Hermione in the books that would indicate that they could make it as a couple (i'm keeping the movies out bcz that just complicates things further). i've read JKR's explanation on this and she said Hermione= Molly. well this was Me=idontbelieveyouJo.
purely in terms of character development, i can see that Jo was keeping Harry's options open-- so yes i can see where Hermione couldve been one such option, but given that JKR decided something else for Harry somewhere in the 5th book onwards, Hermione would look like she was left hanging if she didnt end up with somebody at the end of the series (because by then JKR was already tweaking with her personality, making her less brave and shifting the bulk of the warrior woman bit to Ginny, but i digress).
i think JKR was aiming for the Han-Leia relationship (Star Wars fans would know what i mean) where seemingly opposite personalities that constantly bickers ended up as the greatest couple of the saga. but even re-reading it over the span of 7 books, with Ron and Hermione doing practically everything together (mostly with Harry) i cant see anything about their togetherness that serves as building blocks of a romantic relationship. JKR sets up all the right plot points, but to me, it just doesnt gel.