Choosing your PT should be the equivalent of deciding your starter Pokémon when you were a kid (or when you kept playing 25 years later)
Your Coach should be a good fit for you as you should be a good fit for the Coach. You are going to be working together very close after all!
Believe me I know how easy it is for anyone to say that they've been there and done the graft. What sets me above the rest is that I continue to walk the walk and practice what I preach!
Spending the majority of my 20s boozing, eating stuff that would just result in me feeling like dugsh*t. being unhappy having the skinny arms n stomach fluff. Embarrassed to take my top off in public and avoiding photos as much as possible. Something had to change!