The "perfect" faction for me:
1) Chatty. I can understand that some times of the day will be quieter than others, but if it gets too quiet anytime I'm on, I won't want to stick around long. Hell, my faction gets really quiet some times and I get antsy. And that would be when I'm more active on world chat.
2) No inside drama. PK/TW drama between factions is okay (to a certain point). Rivalry's a good thing. When there's rivalry INSIDE faction, I tend to worry. There is enough drama in my real life home, don't want it in my in-game home either.
3) Chicken. Lots of chicken. Ketchup and hot sauce is good too.
There is no such thing as a "perfect faction"; just perfect by your standards.