When the Catholics were faced with an updated English version of the Mass in 2011, one woman responded to the new wording, “I was offended at the insertion of "I have sinned greatly" into the Introductory Rite. "I don't go around sinning greatly," she said. "I am not going to say this."
Of course, we Lutherans don’t get big and little, grievous and ordinary. We just sin constantly by violating all commandments as summarized into two by Jesus. In the Lutheran Book of Worship (1978) we say,
Most merciful God, we confess that we are in bondage to sin and cannot free ourselves. We have sinned against you in thought, word, and deed, by what we have done and by what we have left undone. We have not loved you with our whole heart; we have not loved our neighbors as ourselves. For the sake of your Son, Jesus Christ, have mercy on us. Forgive us, renew us, and lead us, so that we may delight in your will and walk in your ways, to the glory of your holy name. Amen. ( Lutheran Book of Worship, p. 56, based on 1 John 1:8)
Thought, word, and deed. That about covers it. And that’s sinning greatly.