I'm doing my first one now, from the AQS magazine... it's called "rainbow rotini" Seemed like it would be fun, and I took it as a challenge to use up some stuff from my stash, and not to buy anything (however, I miscalculated on one fabric, and did have to go buy something to match ... the best laid plans ....)
I'm not sure I like the process here tho, cuz it's done over 3 issues, and won't be finished until JULY!!! I don't really like having a project partially done, except for when I put something aside while I decide on the next step -- like what to use for a border, or how to quilt it. I don't have any UFOs other than that. Guess I"m a little obsessive that way -- once I start something, I like to finish it. So this Mystery Quilt process from a magazine may drive me nuts ...