Tarot is less about rules, and more about how your mind/spirit/intuition relate to the cards you draw and place. It is less about prescribed spreads by others, and more about what you are able to discern (even if the spreads are created from the inspiration of the moment). I propose that Tarot is less about what you told to do, and more about what feels right for you.
I agree that, if you are able to receive a message, discern a pattern, or read a theme, then go with what feels right. This is not about what you "should" do, it is about what you choose to do.
This is not to take away from "spreads" as we commonly refer to them. Indeed, I think that you will gain much by having spreads as your normal standby as they give programming, expectation, and focus. Often, however, my normal spreads take on a different configuration as inspiration takes over (and I anticipate others on this forum have the same experience).
Remember, this is about "substance" not the "form" it takes.
Just some thoughts. Enjoy. - Scott