Both Twilight and 50 Shades end with cliffhangers of sorts, they are not fully contained stories, you know the couple is going to end up together in the end yet each book ends with them separated.
People *say* they don't like cliffhangers yet books with cliffhangers continue to sell and be successful.
ETA: Did Hunger Games end on a cliffhanger? I can't seem to remember the exact endings.
Never read 50 Shades, but which Twilight book do you think ended with the couple separated? From memory, they're together at the end of #1, they're apart during 2 but make up at the end... and then I don't believe they're ever apart again.
Off the top of my head, book 1 of Hunger Games didn't end in a cliffhanger, and book 2 might have - the cliffhanger being that Peeta was left behind/taken by the capital.
The only cliffhanger I've ever actually hated was in a book I was bored reading. I really wanted to just finish it and be done, but when I got to the end I wasn't done. I didn't read the second one, but I was annoyed I'd gone through all the dull stuff for the 'promised' happy ending, only to not reach it.
Other cliffhangers I tolerate, but if the next installment doesn't come in a timely manner, it does get annoying.