It's in the spirit of the joke about the man who went to Heaven and gets a tour from St. Peter. They walk past church after church, and the man looks in and sees people singing and praying, and then they sneak past the doors of the next church. "That's the Baptist church," says St. Peter. "They think they're the only ones here."

The Orthodox Church is far less legalistic than the Catholic Church because it recognizes that there is much we cannot understand with our limited faculties (we see through a glass and dimly). It will take doctrine up to a certain point and after that it will declare that the matter is a "Divine Mystery" and attempt no further explanation. This kept the Orthodox Church from lots of silly doctrines (like Limbo).

Another advantage it has is that it has an unbroken line of faith from the earliest churches (Orthodox churches still stand in many of the cities Paul wrote to), through the Roman Empire and Byzantine period all the way to the present, without any Latin innovations. If you want to find a Church that just DOES NOT CHANGE ANYTHING EVER FOR ANY REASON, it's the Orthodox Church. The priests still wear the style of robes and hats that were worn in the era of Constantine the Great, the same a capella music is sung with the same rules, the order of the Divine Liturgy has not changed one iota (a very literal statement for those who retain the original Greek of the first Christian communities), and doctrine has not changed. The world may change, but not the Orthodox Church.