I don't plan it, but I'm open to it. Taro was my first gay character, and finding out he was gay had nothing to do with romance. He was twelve, and a minor character in the book I was working on. Even minor characters have to have personalities, though, and I just couldn't seem to make him come alive. Then I realized he was gay, and he's been a very strong personality since. The book he first appeared in is very much a first novel (meaning it needs TONS of work) so his book ended up being the first I published. (there's a link to an info page in my siggy. And right here on Turtleduck Press
is an excerpt that shows what a strong character he became as soon as I got to know him.
Now I have a lot of GLBT characters. I like smashing stereotypes, and there's lots of that to be done in this genre!