The stuff I found myself nodding to included:
Theosis. Really, this is much more how I see Christ's role than the Protestant substitutiary atonement. This resonates with me- the mystical union with God, attained through the grace of Christ, who acts as a bridge between humanity and divinity. Also, that theosis is seen as both individual and collective.
Seeing the Adam & Eve story as being not about punishment and the Augustinian version of original sin, but rather about limiting humanity's capacity for harm and the consequences of introducing separation from God (though I still don't see it as a fallen Creation, so I diverge a bit there).
While I don't agree that the only proper interpretation of the Bible is within the Church, I also don't agree with sola scriptura, and find value in the Orthodox view of the Bible as a sacred text containing many different kinds of literature and messages, and that tradition also carries truth within it for those open to it.
That Revelation is a mystery and is not meant to be put into some or another political or social paradigm in which events are ticked off one by one to point to the time of Jesus' second coming.
And also, these three points:
* that all souls will fully experience their spiritual state
* that having been perfected, the human race will forever progress towards a deeper and fuller love of God, which equates with eternal happiness
* that hell, though often described in metaphor as punishment inflicted by God, is in reality the soul's rejection of God's infinite love which is offered freely and abundantly to everyone.
More than the rest, I find the idea of theosis quite interesting. It seems that their concept of God is as a far less punishing and condemning Being, and rather (as I do) places the suffering of humanity on ourselves, in the sense that God offers, from God's grace, love and union to all, and it is we who cause our own suffering as a consequence of not embracing it (not that God punishes those who do not embrace it).
I think what appeals to me is that the Orthodox church seems more mystically oriented than many Protestant ones.