I've also gotten in crazy-character quite successfully; I didn't originally intend Paktii to be this talkative and rambling, but as I started writing about him it just seemed right. He's a very smart character, but he's basically lost control of his intelligence and says the first thing that comes to mind, which usually leads to something else coming to mind.
Gwdkwowhi... I'm still working on him. I think I've made him about as moody and serious as he needs to be, but he's also showing a lighter side than I originally intended with Karorahk.
I didn't even intend Wilson to be anything but a joke in Paktii's first post. Now he's running around stealing people's cider.
My characters have minds of their own... it's creepy.
It's funny how that happens, isn't it. The characters all bring out sides of others that wouldn't have been there otherwise. You can make a character with a very strong image of them in mind, but when you actually get to playing them, you find that they could be completely different if circumstances made them that way. I originally intended Karorahk to be much more tough and independent. He was going to be an explorer in the wilds to get me into that part of the game's plot. The current bit though, while completely opposite, is turning out to be fascinating. And to think I haven't even started writing the crizified versions of Krokk and Mala yet... This game is turning out to be even more fun than I imagined.