I just finished reading Anne Bishop's Tir Alainn trilogy. It was fantastic. It's a fantasy novel (as opposed to sci-fi), with wonderful characters and great storyline, and I had to read the whole three books this week because they're so hard to put down. And there is the bonus of characters finding their other half. Be forewarned, though, if you're like me, there will be a lot of crying, but it's the cathartic good kind.
Her first trilogy, The Dark Jewels, was just as well written, and is also highly recommended.