That's a good question for all Christians to ask ourselves from time to time.
In Malachi 3:14, we read about people being confronted with sinful, self centered motives for serving the Lord.
They are asking, "What "profit" is there in serving the Lord? It is clear that what they really care about is, "what's in it for me?"
In 2 Timothy 4:3, we read the apostle's warning to Timothy of the skewed motivations he will encounter in those who claim to follow Christ but in reality only follow their own lusts.
God's people would not be heaping teachers to themselves who lead them into deception, doctrines of devils, error, apostasy (and they are presently doing just that in record numbers), unless there was something in it for them.
Paul spoke of the time when many who profess Christ would cease to endure sound doctrine. Are we living in that time now?
Why are we serving Christ? Is it time to pray the prayer found in the Psalms, "Test my thoughts. Search my heart...?