I've been a Halo fan since CE. Read all the books, attended midnight releases, even fashioned my online identity from the Elites' homeworld. Even longer than I've been a Halo fan, I've loved challenges. I grew up building massive lego structures, playing Zelda: Ocarina of Time with 3-hearts-and-no-continues, even dug an underground fort in the woods with some friends. Now that I'm more grown, I've taken on the Halo games on their most difficult settings ("Mythic" difficulty, which is LASO without using any save/quit, and including blind) and became somewhat of a community leader in that vein. I've even designed and launched the Mythic community site recently (though I won't jack this thread for free advertisement).
Looking for a new challenge several years ago, I came across the fledgling 405th. Though I didn't have the material resources to devote towards making a decent suit, I learned all that I could about armor making (at that time, pepakura was just starting to be explored as an option, and people generally built from scratch). As badly as I wanted to build my own suit, I was still young and unable to devote the time and resources towards the project.
Fast forward and I've graduated from college and started a job. Suddenly, I have a reliable, significant source of income, and a lack of homework eating into my free-time. Needless to say, I immediately dove in to armor making. I looked up the 405th again, caught up on all the new techniques and resources (was surprised to see pepakura so widespread) and finally started building from paper in the evenings. As I am new to this, only get a few hours a night to work on it, and am a perfectionist, it takes me at least a week to build one piece (I've built two forearms and the handplates, rebuilding forearms now due to scaling issues).
My building armor has been a dream for years, and now that I've begun it's already more than a hobby, it's a major goal. I don't want this just to have a cool costume, or to show off to people (though they're nice incentives!) I want this to accomplish something I've dreamed about for years. This is the realization of a life goal, the culmination of a decade of nerd-devotion and patience. This is MY challenge.
THAT is why I am building armor, and mastery of the art is why I will likely continue to build more following my first suit.