why is saying big 6 taboo?

I think what you think is important determines which is the best.

PKT are hardest to get in because most of those girls have serious connections. They are usually from wealthy schools and/ or attended some of the big expensive camps. Girls from those type of places consider those three tops and honestly don’t really even look at other sororities unless those don’t work out. That is why they are typically considered top three. They are honestly not what a lot of people consider top type girls though. Pi Phi and Theta really compete for same girls. Thetas are biggest personalities and party the most. Pi Phis are the most DGAF. Kappas DGAF either but usually end up with girls who do care what people think too. They compete with Chi O and Tri Delta more than Pi Phi and Theta do.

Chi o, then Tri Delta, and then Zeta are probably more typical of what most people consider “top”girls though. They are almost always pretty and often bubbly type personalities. Looks are more important and a lot of them were cheerleaders etc. Probably all of them ran in the “social” crowd in their high schools and were considered popular. Chi o gets the most big city type girls and Zeta and Tri Delta are getting mainly suburban girls.

unpopular because most people do not agree with that order. I do not know anyone who would put Cho or Zeta that high.