pokerstat question

For those who have been using Pokerstat for some time, I have some questions for you. I can use the software to determine the loose players, but what stats and values would you associate with passive/aggressive players? I am sure their betting/raising %'s are a great start, but what value do you consider when trying to categorize a passive or aggressive player? Just trying to get some ideas to better utilize this program.


Thank you in advance


Gary Walker