Hmmm, right now the only book I can remember that I almost DNF but didn't and I'm mighty happy about was Hourglass my Myra McEntire... I wasn't in the right mood for it so stopped reading for a bit, went back to it a bit later and totally devoured it a loved it as well as the rest of the trilogy!!
Tiger Lily was really slow but I'm glad i finished it! That ending had me in tears
Oh wow, I have read a few of them and really want to read others, its interesting you nearly put them down.