Do you have any say in base preference, and if not given can you defer until it's available? If deferral is not an option, what's the process to request next available opening that you're eligible for at said base?

Obviously, everyone wants to avoid a commute but for those who live in cities that are already a base is seems to be counterproductive to assign them to somewhere that involves leaving home many hours earlier (or the night before) to fly their assigned trip.