Well, I must say that I really enjoyed the "good" ending for Ore no Imouto.
The first half of the episode, with Kyousuke out hunting for Kirino's doujinshi was hilarious. The awkward meeting with his friend, Akagi, was one of my favorite moments of the series. I loved it when Kyousuke thought that Akagi was buying the gay eroge for himself; I haven't laughed that hard in awhile.
As for the second half, it was nice to see Kirino and Kyousuke playing an eroge together, but I wasn't expecting Kirino to state that she was going to be going away to America for awhile. I'm guessing that the true end will see Kyousuke not asking what was in the album, and Kirino going to America. I did like this ending, though, and it was really cute to see Kyousuke grinning like a fool at the end when he convinced Kirino to stay.
Overall, I must say that I really enjoyed this adaptation, and I am eager to see the rest of the episodes.