My problem with being mysterious is that I'm not a mysterious guy and I'm a terrible actor. However, I really liked what my DB coach said about GAL. He said find something that genuinely excites you and makes you happy; so happy that other people notice the bounce in your step. I've done a number of things throughout my life that were so captivating that it took my mind off of everything else and my excitement was infectious (or possibly annoying).
My point is, for someone like me (can't act, can't be mysterious) it's probably better to put energy into finding things that put a bounce in my step and takes my mind off of my marital issues. I think my wife would see right through the mysterious doodler.