Can there be more than one of these? I feel like I would fit in to that role quite well, also.
Family gatherings SHOULD be an excuse to get drunk with the people you love. Let the kids play by themselves for a while so you can all tell stories about each other.
Sadly my immediate family is not that fun. We had margaritas for one gathering and I think my mom was going to go nuts. My inlaws are actually much more fun in this regard.