Upbeat and comfortable?
How's about a RomCom Fantasy/Farce?
John Moore's HEROICS FOR BEGINNERS.
http://www.sfreviews.net/heroics.html
Light, frothy fun.
Not quite as frothy but also a lot of fun:
Roger Zelazny and Robert Sheckley's BRING ME THE HEAD OF PRINCE CHARMING.
http://www.goodreads.com/book/show/2...rince_Charming
(This one has sequels.)