I've experimented with writing non-fiction, poetry, and fiction (but all within the YA).
Within YA I've dabbled in historical, urban fantasy, and have brewing ideas in dystopian and contemporary. All with a splash of romance.
But I confess, I wish I could write a mystery.
A really good, gripping, gotta-turn-the-page-to-find-the-killer kind of mystery.
Actually, I also wish I could write some fun chick-lit, or more serious women's fiction.
Man. I have genre-envy, and I've got it bad.
What about you? Do you have any particular genres you'd love to write, but for one reason or another, haven't?