At his height and weight i would HOPE he plays mean. IMO tall big dudes NEED to have a bit of nasty in them just because they are tall and huge and can ragdoll players.
Not entirely. If Robert Bortuzzo was the softest player on the team, but had an active stick and one of the best shutdown guys on this team, does being nasty still matter? Not even in the slightest. You don't need to be nasty to be effective. But for Bortz's case, he's nasty, gets people off their game and he's a solid defenseman, not the best, but he plays a safe game and keeps the puck out of the scoring areas in the Pens zone.
His progress has been great, but he was also regarded as one half of the best shutdown duo in WBS, he had a pedigree already as a guy that was tough to score against when he was on the ice, the fact that it is now translating to the NHL and he's a guy that has moved up on the depth chart and is considered a regular is awesome and also, as much as we crap on WBS for not developing more talent, kudos to the guys down there (CH & Asst. Nas).