To answer the question, Who am I,? this article explains what it means to be created in the image of God. It discusses what that image looked like before and after the fall, and what it looks like upon being restored through salvation in Christ.
The sin of ingratitude is fuelled by pride. In this article some help is offered as to what to do when you feel ungrateful to God. As a Christian you are called to praise and be thankful to God always.