Most Helpful Girl
dang !! that's a hard one... hmmmmmm i'll tell that person that its how i feel about him1
Most Helpful Guy
Because why not?
Because you are my favorite person in the world.
Because that's how I feel.
Because, unlike others, I love your imperfections.
Because I think about your happiness as much as mine.
Because you did X.
It all depends on the situation and person, I guess. I think it is a better response than "thank you" anyway.2