Thoughts on MXTX's works?

The first book I read was MDZS and from then on I fell into the inescapable abyss of MXTX's worlds. I read TGCF, absolutely fell HARD for xielian (they invented love, it's irrefutable) and I am currently reading and squealing over SVSSS fluff at 2:31 am here (≧∀≦).
Have you read any of the books? What's your favorite? :)