most friendly?

I'm not in a sorority (doing informal) and on the shyer side, and often times girls wearing their letters aren't friendly and only talk to girls in their own circle. However, from my experience, the more outgoing and friendly sororities that talk to other people are Pi phi, XO, and AXO. XO can be a bit judgemental, largely for religious reasons, but all in all these sororities tend to have the friendliest and most down to earth girls. This is also just my personal opinion, and I'm sure there are other sweet girls in other sororities :) I'm just never surprised when the really nice/friendly girl is a piphi/xo/ or Axo.