I've been collecting cards since i was 15 years old...going on 53 now..ugh I collect Pre-1930 American & Foreign decks. It's VERY hard to say what my favorites are as there are just so damn many great decks of cards out there! But, if pigeonholed, i'd have to say that early War/Military and historical decks are at the top of my list followed closely by Early Advertising, Transformations, and Standard decks.. As a sideline i collect Wide Congress 606 decks. Since the begining of this year I have become an avid supporter of many of the great Kickstarter decks that have been put out... lots of great decks!! I'm looking forward to adding my voice to the discussion of this GREAT hobby and hopefully expose it to new collectors. for the life of me i still can't understand why it's not a more popular collectible... the Artwork, History, Printing/design techniques, Displayability, education value (you can learn a hell of a lot from them there 52 cards... well the Non-standard ones.. lol)... it all adds up to a fascinating hobby!