It's funny how perspective varies. Yeah, I can see how you come up with 4 SF/Fantasy but of those there is only one I would reliably recommend as truly fitting in the genre:
The Left Hand of Darkness is recognisably SF to most SF readers.
Never Let Me Go? Most SF fans aren't going to get it.
The House on the Strand, nope, not a book for SF and fantasy fans.
The Graveyard Book is borderline; sure, it's obviously fantasy (technically true of all fiction), but not in the sense that many fantasy fans might expect; it doesn't feel entirely like children's fiction to me but is generally categorised that way, and it is the same sort of fantasy as a children's book - the sort of story that gets called fairytale rather than fantasy, the difference being mostly of expectation.
It's this sort of mismatch of expectation that leads to problems with a genre based selection. I really liked
Never Let Me Go, and I'd have to agree that it was technically SF, but it never felt like SF when I was reading it. To me, calling it SF would be misleading.
So the theme system disconnects us from our preconceived ideas of genre. And I like it for that, although the very lack of boundaries can be a problem too. But it's very much a first world problem, and not one to lose too much sleep over.
