Greek Life

I am currently rushing a couple of fraternities this semester that Ive had some enjoyable time with. I was wondering what the general consensus is on some of the fraternities if they have any stereotypes or if the people there you think would not foster a good environment to be a part of? I know everyone kind of puts their best foot forwards during rush and you dont really know everything yet.

Notably: SigNu, SigEp, PKP, Asig, Lambda, and theta chi?