Argh, difficult choice! I think I would choose to have a Warbreaker sequel, given the epilogue to WoR... Whoops, didn't realize there was another page to this topic.
Answering Landis's question now: I'd much rather drain into a bronzemind, since "sleepy" is kind of my natural state of being anyway.
Would you rather have to choose one Sanderson book to be the only book you read for the rest of your life, or not be allowed to read ANY Sanderson books for the rest of your life?