As a kid, I mostly used whatever was bought for me; Bikes, Bees, Hoyles, etc. I did have a "Marshall Brodien's 'TV Magic' Deck", but with little skill to figure out anything more than simple "Is this your card?" tricks. Same thing for the two stripper decks I owned at two different stages of my life; young childhood and late 20s. I did sometimes get cool airline decks, thanks to a godfather who worked at an international airport.
In my mid-30s, Texas Hold 'Em Poker was becoming a big deal. My family started a semi-regular Sunday night game. We bought Bikes by the brick (not knowing they were bricks, since we got them in retail display sleeves) and the most adventurous we got with deck selection was Jumbo Index, since my dad's eyesight wasn't was it used to be.
Around mid-2010, I thought it would be great to revive the old poker game, perhaps with some of my buddies from my early 20s, but I thought it would be cool to get something more unique - I'd seen an ad for one of the poker shows (or it might have been for a website) that had players using black cards and I thought they looked cool. I did a Google search for custom playing cards, and Ellusionist was near the top of the list. I looked and WOW - the cards were so cool, not like anything I played with before. I hemmed and hawed, since the cards were also priced unlike anything I'd played with before (!), popping in on the website now and then, window-shopping without buying anything.
By Christmas, though, I had some extra cash, "semi-disposable" income, and decided to take the plunge. I went for pretty much every deck they had available at the time, and over the course of two shipments, I had half bricks of the decks that they had gaff decks for (plus the gaff decks), some DVDs, etc. Got the first shipment on Christmas Eve and took it to work. By Christmas morning, I was already performing some convincing tricks. Within a week, I placed that second order, and by the time I was done, I had a Gold Arcane and a Black Ghost 1st Edition in the Lucite case.
The rest is history...
I find it interesting how an Ellusionist deck is the "gateway deck" for quite a few deck collectors...