First a little about me, I'm 14 and got into cards because an illusionist came to my church and one of my friend's-friends brought a deck of cards and did some card tricks. More specifically, the ambitious card trick. But the part that really got me into magic was the card in the mouth trick he did. I then started getting into card tricks, and with that came my obsession with card collecting. My collection probably consists of about 80% Bicycle decks. The decks I've been trying to get recently are limited edition decks (for example, the Elite Collector's deck). Now onto my collection.

The cards on the top two rows (and signed Gatorbacks) are all still sealed, still in plastic.
Cards on the bottom two rows have been opened.
Now I'll go ahead and add any little "special notes" about the decks that I need to.
Shadow Masters: it's an invisible deck, the box is also in poor condition. You can kind of see if you zoom in.
World Series Of Poker: These were the first non-crap decks I got. (By crap, I mean dollar-general cards that don't stay together). I also got them for my birthday, which is nice.
Kings decks: One of them is incomplete. It's not missing any of the main 52 cards, but the angel Z cards and other gaff/advertisement cards are missing.
Black gatorback: This deck is probably my favorite. I've used this deck a lot and the cards are still in great shape, and I LOVE how many hidden reveals this has (one on the queen of spades, two on the box, and one on the Ace Of Spades). The cards also look splendid. I'm sure I'd love the reds just as much, but I want to keep those sealed.
3 other decks I've got coming to me are an Elite Collectors deck, and two White Pearl collectors decks by Elite. And one that I can't wait to buy is DisturbReality's upcoming deck.