Tense and aspect are not something that has only one correct form in a given situation.
The Blind Baron asked me if I was interested in learning drums and I took him up on his offer. I had always wanted to learn how to play, but the opportunity never presented itself, and I never pursued it.
In this scenario, the reason that had wanted is used as opposed to wanted is because you want to make sure that the act of you wanting to learn preceded the act of you taking him up on his offer.
Now, the reason that presented and pursued are used instead of had presented and had pursued, respectively, is because the acts of the opportunity never presenting itself and you never pursuing it do not precede the act of you wanting to learn but follows it.
Still, you can use had presented and had pursued to emphasize that these acts precede the act of you taking him up on his offer. But that's not mandatory but optional, because no one would confuse the chronological order of these acts even without the help of the past perfect forms.
When there's no confusion, always go for the simpler form.