Jonathan Drouin has been my favourite player to watch so far.
Mike Reilly has impressed he hell out of me so far, Columbus has something there.
Ryan Strome and Morgan Reilly have been standouts to me as well.
For Canada specifically, RNH has played exactly how I expected him to (a man amongst boys) and Huberdeau has been slightly disappointing. He has a lot of assists and is tied for 3rd in team/tournament scoring on the "NHL line", but I thought he was going to take this tournament over (a la Tavares or Brayden Schenn).
I have mainly watched Sweden and Finland play. Teravainen has been one of my favorites for a while and one of the most fun players to watch in the tournament, I also like Ristolainen's game. On the swedish team I really like Forsberg and the way he challenges his opponents with his moves, sometimes he tries too hard though. I also dig the way Lindholm handles the puck, so incredibly smooth.
You have to be careful about what makes a great 17 year old player at the WJC and what makes a great pro. There have been a lot of World Junior standouts that have gone onto amazing careers at Dairy Queen.
With sick hands like that, you can bet those Blizzards will be amazing.
Have loved watching Rielly and Biggs from a Leafs fans perspective. Also have enjoyed watching Galchenyuk, Dano, Draisaitl, Reway, Subban, Trouba, Gibson, Yakupov and Nugent-Hopkins. From last year I very much enjoyed watching Hertl, Musil, Barkov and Ristolainen, but since they aren't televised in Canada I haven't been able to see them outside of highlights or at all.
Those are the only four i've found myself keying on to this point. I never start watching a game with the intent of focusing on any individual so its good on them for drawing so much of my attention to themselves.