I primarily play first base and have always used my regular 13.5" glove. My question is: would it be worth investing in a first baseman's glove or do they really make a difference in catching and digging balls out of the dirt?
The bigger the better. At first, getting the ball out of your glove is not the most important thing. What is ... is having a big, deeo pocket so the ball stays in there from the throws from your infielders, sometimes not so good ones.