By Mark & Melissa Roxey Cast lists just went out for this year's Nutcracker productions. In the next few days, there will be excitement in some households and disappointment in others. That's normal — it happens every year, at every dance school and every company, from small community studios to major regional ballet companies. What matters is what we do with it. Between us, we've spent decades on both sides of the casting sheet: as dancers waiting to see our own names (or no