I can add some to this even though my Pyr experience is only raising 3 pyr pups,my pyr is only 15 weeks old so alot of what I say some could be puppy behaviour as well as Pyr behaviour.
Bear thrives to be around people,I let him outside with our Cocker and then he wants right back in,we do ths in and out thing all day long
he does like to be out when its cold,rainng and dark,he is hard to drag in when its dark or raining.I think he gets hot in the house is why.
He is leary of srangers,he will run away from them and growl and now bark,he is avery aloof.He is in the house and around lots of people and he is still very leary with someone he doesnt see very much,He barks alot when in his crate,he barks at us when we walk through the room,he wants out.He has a DEEP BOMBING bark even at 15 weeks
I have to say so far Bear as displayed the "Pyr temperment" I have read about.When in the house he does sit with me mostly at or near my feet btu when he hear a noise he likes to stray off to check it out then comes back.
I do have to add that having the 3 pups from 10 days old they where the quitest,calmest most easily managed pups i have been around(i use to raise dobies and labs)
I will surely have another in years to come.
I have to comment on maxsmom,your pyr probably does not have the thick coat because he is inside,Most of the ones I have seen that are more inside then out their coats are not as full,when kept exclusivley outdoors they have the thick coats.