I read a fair amount of psychological/domestic thrillers, and one of my habits is to look up the reviews on Amazon after I've finished it. Without fail, there will be a fair number of reviews saying that they didn't like the book because the characters are unlikeable. Isn't that par for the course with thrillers? If everyone was super functional and nice then there wouldn't be a plot.
Does it put you off a book if the characters would be unlikeable in real life, even if it's a crime/thriller novel?