Here's a more general one, what are some practices that are different from other denominations? Or even ones you find interesting?
Honestly, the practices are almost completely different, depending on what you mean by "practices". Christianity in general shares the same values, same core beliefs. I think you could say we all pray, for example. But HOW we do things, and in some cases what we actually do - is different from all the denominations out there. Since our practices are ancuent, we would say the others that were formed and changed through history have lost (or never had) what we maintain. Though to be absolutely fair, you could also say they have added things that we lack. But generally speaking the modernization of Christianity has NOT been a good thing, though some aspects may be aimed at people's enjoyment or comfort.
The Liturgy itself, for example, is unknown to many kinds of Christians. Those that do have it it seems to be abbreviated and changeable. I haven't been anywhere else with so long a service involving so much singing, and chanting, and prescribed movement and prayer, yet at the same time very free.
I think we are unique in veneration of icons, except those others who might have adopted the practice and for them it is "allowed" but not an important part of their participation in the communion of the Saints.
Our views on sin, mankind, and salvation are unique. Rather than the western tendency to salvation being something of a legal contract primarily, where guilt is expunged, from persons who are usually seen as fully evil from birth - we tend to view mankind not as evil but rather born with a tendency to do what we want to do, and that invariably leads to sin. Continuing to engage in sin, to feed those natural desires we have leads them to grow into unnatural driving forces that to some degree control us. Salvation seeks to put all this in order, heal us from the effects of sin, restore our freedom and control, and this makes us right with God - in the process we become what He intended us to be, which is created persons that are like Him (though He is uncreated and we never "become God").
Because of this we have a lot of tools aimed at helping us to cooperate with the grace of God and be healed, and a far richer tradition of this than anyone else, without going into perhaps the excesses of things like self-flaggelation. Many kinds of Christians have no real concept of spiritual disciplines or spiritual oversight, both of which are available to us and advisable to be used.
Other differences range from small to large, depending on who you compare us to. Different schisms and reformations that have happened in the west have created very different kinds of understanding of who we are, what we should be doing, and how among some. Very different at times.
Not sure if that's what you're looking for or not.
