He definitely didn't want to hurt anyone's feelings. Everyone knows it is A.J. He said it in the past that he known him the longest out of anyone. He became closer to Nick because Nick was hurt and probably a little lonely when first, Brian got married and second, Brian had Baylee, his son with his wife, Leighanne
Howie paired off with A.J. while Brian was with Nick in the 90s. Kevin just supervised everyone. Howie got along with Kevin because they were both very professional and serious about making a career in music.
Forget one direction they are not as good and I don't think they write lyrics to lift spirits, encourage lives, and for those who feel different like you backstreetboys.