Implement a search engine when choosing a trainer or coach?

We have the ability to refine the list by move generate, move charge, gem generate, etc. By using the drop down on the trainer select screen. What would you suggest to make it better? A "recommended" option? Maybe a highest rated option? Or maybe add a choice for coaches that affect certain classes more than others? I'm not sure exactly what you mean, but you've piqued my interest.