Trello is such an universal tool that we started to manage feature requests, feature ideas, prioritization, usability problems with it.
We created a new board named Ideas and this is the central place where all the feedback from users goes.
By reading this excellent article “How to build great products” we created three lists: features, showstopper features and distraction features.
It is truly a great categorization of features. After this exercise I am sure where I should put each feature.
However, not every feature is good to place in those three buckets. That is why we created another lists: usability improvements, onboarding experience and robust software.