Back in the day when ever there was "favorite Bruin" poll I'd vote for P.J rather than one of our more offensive yet forgetful forwards.
P.J played nearly all aspects of the game correctly. Wanna talk about decision making, he never made a bad one. You'd have to go a week of games before you saw him do something even remotely irresponsible. Sort of like a Bergy without the offensive prowess.
Any given shift he did everything to throw a monkey wrench into the other team's plans. All without getting out of position, which is another thorn in their side, the guy was practically never "beaten" by a player of similar size and speed. What we now call "gap control" and "stick position" was simply a natural part of his game.
I don't know if there's an equivalent these days. Imagine a europlayer not using his skating and stick abilities for offensive, but for defense almost exclusively.