When I played baseball as a Sammamish youth, I always enjoyed playing first base because it meant you got to catch the ball a lot. Not to brag, but during the real early Little League days, I was typically one of the only kids on the team who could consistently catch the ball, meaning I spent a lot of time at the cold corner.
As one progresses through the baseball ranks and catching the ball becomes fairly elementary, first base becomes less and less important. You want the most athletic fielders playing up the middle and the slower grass pickers on the edges.