I've also noticed that some covers also stand out because they seem sort of wrong for the book. The best example I can think of is the cover of my newest copy of Persuasion by Jane Austen:
This is a lovely cover, but makes absolutely no sense in my opinion. I find it very unlikely that any of the female characters in Persuasion would be wandering the fields in bare feet. Despite the fact that I obviously know better, I have no doubt that book covers will continue to influence me in the future. What about you?