Very good and important point, Derech. The Maharal says that a Baal Teshuva (a sinner, not a secular upbringing) has this shortcoming that he is a person of regret. He has a trend in him to turn around and switch directions. That can be used for the good or for bad.
An atittude is something that gets learned but not forgotten. Once somebody spent time enjoying the wrong things, the enjoyment and appreciation of them doesn’t leave the sytem.