I'll choose this; I really love its original manga.

For the most part, I'll stop watching an anime, if I don't like the first episode, but I don't count those instances as dropping a series, not unless I have watched at least three episodes.

Reason(s) for dropping the Melancholy of Haruhi Suzumiya: The plot is absolutely ridiculous, annoying, and the organization and development of the series is below amateur, at best. The title character annoys me to an intolerable extent; Haruhi is my least favorite anime character, overall. If I could describe this series with one word, "idiocy" would be my choice.

Reason(s) for dropping Black Butler: I just dislike the way that the original manga was carried out through the anime adaption, and I feel that its likable characters were ruined.

Reason(s) for dropping Noir: I simply don't have the remotest interest in this series, neither the plot nor the characters.

I never watched Noir so I can't say I like or dislike it.

The Melancholy of Haruhi Suzumiya is awful compared to it's manga and the plot itself sickened me. I could rant on why I don't like it but it would take too long.

I like the anime adaption just as much as the manga. Though there were stuff in the anime that made it one of my favorites.

^I plan on watching just the second season of BB, once I complete the manga, considering that it has several new characters and plot conceptions that have nothing to do with the original story.

Ah,yes. The second season has new characters. It's not a bad season to be exact.

well this is the only one ive watched out of the three, and i thought it was alright!

Also TMoHS.

And Kuroshitsuji.