Imagine a heterogeneous team using different template classes. In that context, “most used” quickly becomes ambiguous – which is exactly the case in our use scenario.
The UX would be more satisfying if you either allowed a sorting option or, if you stick with the current heuristic, provided a way to limit the selection to specific template classes.
The template plugin already supports multiple categories for storing templates. This could be leveraged to implement the latter approach.
Thanks 