The personality DOES make a difference, but it’s not the ONLY thing that matters. Life is very seldom Either/Or, it’s usually many different things that matters at the same time. Quite a few things that matters belongs with the OTHER person; what he or she likes, which mood he or she is in, what up-bringing he or she had, if he or she has met a very mean or a very pleasant person who you remind them of.
Oh, and PUA doesn’t work as love and relationships aren’t slot machines. You can’t put up one behavior that will make EVERYONE like you. Also, you can’t pretend in the long run; sooner or later the Real You will show up, and if that is too far away from your Bullshit PUA Persona, people will stop liking you.