The game that really got me into paper and pencil RPGS was Vampire: the Masquerade, back with the Revised Edition in, what, 98? I'd been playing in a couple of other World of Darkness games prior to that - Vampire, Dark Ages, Changeling: the Dreaming, Mage: the Ascension - and chose the Revised V:tM as my entry point to serious GMing, or Storytelling, to use the game language.
I immersed myself in White Wolf products from then on, with little or no time for other systems.
Of late, I've tried to break out of that thought prison, and expand my horizons somewhat.
I'd already given d20 a shot in the early to mid 2000s, and looked elsewhere.
In the past year I've run Fear Itself and Trail of Cthulhu, both Gumshoe games, and Star Wars Saga Edition, a d20 derivative. I've also invested heavily in Pathfinder and dug out my In Nomine books.
Tonight the GM for the d20 Modern game I'm playing can't make it, so I've offered to run a one shot game.
After a short discussion, we've settled on a supers game, which means Aberrant.
As a result, I've been pregenning some characters, and I cannot express how good it feels to come back to the Storyteller (ing? I forget which is which) system. Filling in the dots. Not having to reference stuff constantly. Understanding things I do have to reference.