What is your favorite Masechta in Shas, and why?
Arachin:- It covers a nice array of Topics. This in addition to the fact that the Chofetz Chaim made such a strong impassioned plea for everyone to increase learning in Seder Kodoshim.
What is your favorite Masechta in Talmud Bavli??
How about Yerushalmi?????? I have currently learned 2 Massechtos in Yerushalmi, 1 of them being Berochos, and it is awesome.