I finish the book. Sometimes its hard for me but I always finish the book because if I dont, then ill always be wondering how it ended or will wonder if I gave up on the book too soon. Most of the time, its a waste of time but I have been pleasantly surprised on occasion.
The least I could do is finish it. But thankfully, I got older and built up the nerve to put a horrible book back to the shelves.
I feel like I should finish whether it is good or not. I have on occasion read the end just to see how it will end.