Something next to normal, that's the thing I'd like to try

Well, they seemed to know how to write it for five seasons. I'm honestly not sure what happened. Then they just 'decided' that she's always been in love with him. Way to ruin one of the best brother/sister relationships on TV. But it also plays into the the writers' trope (or cultural trope) that the most important type of relationship is a romantic one.

I went on at length about this here last year, lol:

http://goldenusagi.livejournal.com/459836.html