Which do you think is the most difficult position in baseball?

1st baseman [corner infield] for sure.

i'll say pitcher, cuz its equivalent to a QB, if things go bad it usually rests on your shoulders...although, SS is a very close second

I said pitcher and corner infeilders. Pitcher because of basically exactly what Hatchet said, plus it takes extraordinary control over a baseball and brute strength to do what they do, and the corners because.. well.. it's "The Hot Corner" for a reason at third, and the first baseman has to have basically the second-best glove on the team (after the catcher)

I put pitcher and outfielder. Pitcher for the same reason, and outfielder because when the occasion arises, its up to them to make the plays.