One of the toughest decisions older Americans can make is whether or not to leave their longtime home. While many experts recommend downsizing for financial and health reasons, the decision isn't so clear-cut for most seniors. A recent survey of more than 4,000 Baby Boomers by The Demand Institute found two-thirds planned to age in place. Need help weighing potential pros and cons of downsizing? Here are nine common reasons to consider moving out, and nine more in favor of staying put.