Same here. Although I rarely even give it 50! A quick glance at my bookshelf and I probably have almost 20 books that are partially read If a book doesn't grab me immediately I usually move on. My only exception is a few King stories like Lisey's Story or Insomnia. I had to finish just because, even though I really didn't want to
And I really enjoyed Under the Dome. And considering it's length I didn't think it dragged at all.