Ah yes. Harry and Ginny. I have to admit that upon my first read of the series, which was rather late in the game (it was after HBP was released), I didn't really gather that Harry would eventually see Ginny as anything other than his best mate's sister.
It was clear, of course, where Ginny's interests were with regard to the famous "Boy who Lived", but when I finally got to HBP (where it became obvious that Harry was beginning to find himself attracted to Ginny), I was rather (pleasantly) surprised.
Upon subsequent re-reads, it was still not entirely obvious to me that they would end up together, although the clues here and there were easier to spot.
Of course, I still wonder at those who believed for so long that Harry and Hermione were destined to be together as it was made
abundantly clear by Rowling that brilliant Hermione and, um, not
quite as brilliant Ron were nutters for each other. How could anyone have missed
that?
Then again, I suppose the same could be said of me missing the whole Harry/Ginny dynamic at first.
Clearly, romantic love was not Rowling's major point of emphasis in the novels, at least not as far as I'm concerned. It was very light-hearted as far as romance went - she never delved any deeper than she had to - but again, that wasn't really where her story's focus was concentrated.
I do think that Ron and Hermione represent our contemporary idea of "opposites attracting", even though it could most definitely be argued that both these characters are quite similar to one another (especially in terms of low self-esteem at times).
The Harry/Ginny pairing is the most intriguing to me though, because, as
Kabbymoh states, the girl clearly knew what she wanted and went after it!
The thing I can't quite figure out though was whether or not Ginny took Hermione's advice regarding Harry completely to heart, or whether it was just a ploy to get Harry in the end.
I'm inclined to think that she truly did throw herself into her friends, various boyfriends, etc., and made a valiant attempt to consider Harry as just a friend - and was able to do it because Harry did eventually respond to that genuineness - if it came off as a farce, I'm not sure he would have responded the way he did.
So, this brings me to the whole "want what you can't have" aspect of romance, which is one of the most vexing things about life, in general. Ginny, from the get, was crazy about Harry (that infamous valentine probably mortified him), but he only had thoughts of pretty Cho Chang (who, interestingly enough, he looked upon as someone who would be hard to "get").
He barely realized Ginny was there in a romantic sense. It didn't help that she was tongue-tied around him - how was he supposed to get an idea of her personality if she never showed him who she was? Of course, when he finally took notice, Ginny became yet another romantic interest that he perceived as hard to get. I'm not sure how much that may (or may not) have added to his attraction for her.
But, of course, he didn't know much about Cho either, and he was attracted to her, so there are no straight and easy answers in the game of love - which I do think Rowling touched upon (but you really have to look for it, imo).
What's great is that, Ginny has quite a lot of Fred and George in her, and Harry certainly likes them, so I'm sure he was pleasantly surprised at this aspect of her personality, once he got to see it for himself.
Long post, I know, but I've always been drawn to the romantic apsects of literature, and with the Potter books, although it is clearly a theme woven throughout the series, I feel it's up to us readers to fill in the romantic gaps that Rowling has (purposely?) left for us.