Neat idea for a thread.
Off the top of my brain...
(The Inheretence): These are my Dad's right now... but as he doesn't bother with message boards, I'll brag for him.
Pretty much every "immortal" hall of famer rookie card I can think of.
My grandfather's friend was an employee at Parkhurst (the cards were called "parkies"), that started printing hockey cards in the early 50s. Among that collection are Howe and Richard "rookie" cards, that aren't actually rookie cards, but because of about a 10 year print gap mostly due to WW2, this was the first time they (Richard and Howe) had been featured on hockey cards.
There are lots of 'un-notables' too, but the fact that the entire set is from the 51-52 season, its pretty neat.
My old man has these in a safe, in a bank. They will be mine when he is gone.
He also has a game used signed stick from Bobby Orr, and a signed Orr jersey.
My stash is far less "cool":
I have a number of complete season sets of UpperDeck cards from the early 90s. Lots of neat ones in there: Bure, Lindros WC card, etc.
Notable Random Rookie Cards:
Mario Lemieux, Joe Sakic, Peter Forsberg, Mats Sundin, Mike Bossy, Mike Modano, Steve Y, Sergei Fedorov, Teemu Selanne, Martin Brodeur, Pat Roy, Nik Lidstrom, etc...They range in quality, most are in great shape and in hard plastic. Some have bent corners
. Never did get my hands on a a gretzky rookie card... maybe eventually but they are too damn expensive.