Point 5 is the worst situation because today people are anyways starved for genuine relationship and if you make yourself hard to get then you'll be the one to suffer eventually while wasting other people's time and emotions. This is my biggest turn-off because nobody can read minds and so it is nearly impossible to guess whether that person is genuinely not interested or playing stupid mind-games.

Point 4 comes next in my list of turn-offs. A partner's purpose is to add value to one's life by being a strong support. Playing dumb to make one's partner feel good about themselves makes you unreliable as a partner, especially during difficult times in life.