Well since we all know that we have the advantage when we are in position (in the SB) I like to min raise a pretty high % of the time because I don't mind increasing the pot size due to this advantage. Since I will be winning more pots when I'm in position, I like to build pots so that I can win more than if I was to limp in. Also, by being aggressive I can FORCE my opponents to make mistakes - instead of limping and WAITING/HOPING for them to make mistakes. Moreover, I like min raising instead of 3x raising because of the rapid blind structure and short time at each level, along with the short effective stacks. I just feel more comfortable playing in these size pots post-flop rather than making it 3x and bloating the pot for no reason.