In the Orthodox Church the Eucharist is ALWAYS received standing because we are receiving Christ Who is Risen.
At weekday Divine Liturgies (other than the 40 days from Pascha [Easter] to Ascension we kneel at the epiclesis, that is, the Priest’s prayer asking that the Holy Spirit would make the bread the Body of our Lord and God and Savior Jesus Christ, and that He would likewise bless and hallow that which is within the Chalice.
During Great Lent we do full prostrations on the floor—whether carpeted or not—during the Prayer of St. Ephraim the Syrian; as we approach the Cross for veneration; as we approach the Good Friday bier; and at many other times.
That’s y’all’s perogotive, I guess.
I choose to kneel, in submission, before my Lord God with hands folded.