I think your take on this is very different from mine. Mostly I think you’re combining things that I would separate: a vocation and spiritual growth.
In my own case, Benedictine spirituality is very comfortable for me. That’s who I am! I belong to a Franciscan parish, and despite spending lots of time around both friars and secular Franciscans, I never considered becoming one myself. It’s great for them, but that’s not the spirituality that’s mine. When I go to my abbey, I’m “home” in a way that’s different from my parish. The Benedictine Rule is a guide for my life and someplace where I can continue to explore and deepen my faith and my spiritual practices.
I can’t imagine that I would want to try and find a spirituality that doesn’t quite fit and use that as a way to make myself grow. That sounds like a path to misery rather than joy.
On the other hand, as something separate from a vocation, there is spiritual growth and I see that as something we all need. Take a look at Chapter 4 of the Rule. Do you have all those things mastered? Or are there areas where you could use the Rule as a guide to identifying places that need change and growth?
In another sense, there are areas for all of us in terms of spirituality. I did an exercise in a class one day that involved listing the broad areas we considered part of a balanced spirituality – things like prayer, community, service to others, study – and then listing specific items under each of those. I met with my spiritual director shortly after doing this exercise and showed him my chart. I asked if he thought I had hit on the major areas of the spiritual life. He thought I had, then asked me where I felt I was the strongest and where I felt I was the weakest. And once I had identified those, he asked if there was something concrete I could do in my weakest area. I came up with a concrete step I could take and it actually felt good to think that I was improving that part of my spiritual life.
If you’re a Benedictine at heart – or a Carmelite, Franciscan, Dominican, etc. – then why not immerse yourself in that life and grow within it?