From Comfort Reads to Comfort Writes

Authors,

Is there a series or group of characters that you've written, that you would always go back to write more of? 

I have a "comfort write".  It's my BATTLE LORD series.  Again, somehow those two main character are so much a part of my soul, I could go back and write book after book about them.  If I ever get into the writing doldrums, and can't go any farther in my current WIP - or if I've finished a book and can't find the energy or inspiration to start a new one - I know I can pick up where I left off with Atty and Yul, and resume their story.

I'll be SO GLAD when I can get the rights back to the first book, so I can offer it to a legitimate publisher, along with the sequels.