Unless you plan on joining a world 1st raid group, then play the one you enjoy the most. They are both completely viable for anything in the game. War is a few % points more optimal, but that gets turned into hyperbolic sky is falling here on the forums. Play what you enjoy, both tanks will get the job done and then some. As you said, theres no point in chasing the current flavor of the month. Drk used to be one of the cool kids. Pld is now. Even war used to be 2nd string. Play what you like. Buffs and nerfs will come and go. Fun is forever.