I finished Yosuga no Sora and Ore no Imouto this week. I stand by my earlier comment that Nao's best ending was far better for Sora than Sora's "best ending" (and for Haruka too). But ymmv. Sora's final arc was certainly interesting. Ultimately I didn't care about the characters very much.

Ore no Imouto lost its narrative thread midway through and never really regained it. I guess since it wasn't gonna ever go where Kirino's games go, maybe that left it nowhere to go. But they played some interesting cards, and I came to enjoy the characters. Next summer there are supposed to be some specials that provide alternative endings, but I'm thinking, "endings for what?" If there's no narrative how can there be an end?

I am also continuing with Kuragehime. That really has turned out to be the sleeper for me. My hat is off to Rob for mentioning it on this forum, even if he dropped it. The girls at the house are a bit silly, but the rich boy's family situation is more interesting, and I am amused how the main character can be transformed into such a beauty (and back).