Wow, so many to choose from its hard to know where to start, I'm a Ranger fan so here goes:
Ouellette - Kid looks like a future NHL all-star to me, wow what a skater and such good instincts, I think he's going to be awesome.
Nyquist - 200 foot player, really nice offensive instincts, unselfish, I could go on....
Nic Petan - Who wouldn't want this guy, if he can stay healthy he's really going to be something to watch.
Adam Lowry - Love his game, at 6'5 adn the way he skates, I just see a dominant player in a few years.
Shea Theodore, Josh Morrissey, love both of them, think they will be very high end talents.
Kucherov - Is going to be a sensation a la Tarasenko, Yakupov etc, needs another 10 pounds to survive the NHL but what speed and offense, WOW
On the more obscure side, I like Erik Haula, I just see Andrew Shaw written all over that guy. Also really like Michael Ferland, who changes the way the opposition plays when he's on the ice, he is downright "country tough" without being a goon.
Sven Andrighetto - If he can physically hold up he is such a gifted player, special ability to see the ice, so fun to watch skate.
Special non-prospect prospect jealousy award to Burmistrov, who was criminally mishandled in Winnipeg by a borderline incompetent coach. He's such a special talent, a great puck possessor and is one of the very few guys that each team has that truly make the other guys around him better. And the Jets screwed things up so bad that the guys finally said ******* This, I'm outta here.
I could go on & on Nick Baptiste, Oliver Bjorkstrand, Myles Bell, Andre Burakovsky, Madison Bowey, Jon Diaby all deserve mention as well.