Good question. I honestly don't really know. When I was little, I always used to like playing pretend- Halloween was always one pf my favorite holidays... But I honestly really don't know why I got it into it.
I guess the fact of the matter is, I just like to play dress up. XD It's developed more since then, of course. Now I actually like the challenge of making things - it's a way to channel creative energy as well as deal with some stress relief.
While I'm still not entirely sure of my own reasoning for liking this hobby, it makes me happy. In the grand scheme of things, that's all that matters.
Vaati, Original Design (LoZ: Minish Cap) - budgeting
Gakuko, Shanghai Disco ver. (Vocaloid) - 50%
Yami Bakura (Yu-Gi-Oh!) - need a trip to Goodwill, lol
For the Future:
Malon - Legend of Zelda
Levi - Shingeki no Kyojin/Attack on Titan
Seras Victoria, OVA/Manga ver. (Hellsing)