Old-timers, newcomers, newbies and rookies

If we imagine a company, or a club, or a team, the people who have been there for a long time are called old-timers. The people who have arrived or joined recently are newcomers. Sometimes the newcomers are also called newbies.
This image is from the baseball film Bull Durham. Tim Robbins is the newcomer and Kevin Costner is the old-timer brought in to help him improve. In sports, newbies are usually called rookies.
Which one do you prefer to be, the old-timer or the newbie?