I pondered this question for a bit so I could crystalize what I wanted to say. Jesus said that leadership in the body of Christ should not be as the gentiles who lord over those they are called to lead. Lets face it, most all of us have grown up in a heathen or gentile culture. We see leadership much as we see the carrot that is dangled in front of us. The next level is always a tantalizing temptation for our human ego. We easily bring the culture of the business world with the CEO and multiple layers of leadership, each with its own level of power and prestige, into the church. This causes us to very soulishly pervert Biblical truth about leadership.
I have seen people clamor for leadership in the church. They think they should be looked upon as a leader and are offended when this does not happen according to their own estimation. Yet they still desire to be looked upon as leaders so they can have the prestige of position.
The absence of leadership is anarchy, even in the church. God has set leaders the body of Christ. Leaders are examples and servants to the body. Jesus said that if a person desires to be great in the Kingdom, that person must become the servant of all. Leadership is set in the body for specific purposes. Elders or Bishops (the terms are Biblically synonymous) are given the task of oversight of the body much as a shepherd oversees and feeds his flock. Apostles, prophets, evangelists, pastors and teachers are gifts to the body for the purpose of bringing the body into maturity. They are ordained by God alone, recognized by mature, established leadership in the body, and minister almost exclusively to the body, which in turn ministers to one another and to the world around them. Deacons are given ministerial oversight of specific aspects of servant ministry to the church, i.e., the feeding of widows.
As long as the title we apply is simply descriptive of the ministry, the title is not a bad thing. It is much the same as calling a hand saw a hand saw because we use it and our hand to saw a piece of lumber. But if our perversion of Biblical leadership with the Gentile paradigm leads us to seek the title for selfish purposes, better to have no other title than brother or sister so and so. Hence Jesus' instruction on Matthew 23.
We must come to the place where we see the body of Christ as it should be. We are one interconnected whole in which each member is responsible for walking in the empowerment of the Holy Spirit to supply to the body as God has ordained him or her to supply. Anything else is born of jealousy and envy from the flesh after the pattern of the world, and not after God.
Unfortunately we as the church are so influenced by the world (We have not heeded Romans 12:1-2) that a Biblical pattern of leadership in the church is rare and a worldly, ladder-climbing pattern is often the norm.
I also see a form of leadership "worship" that takes place as well. We hold our favorite leader in such a reverential position that we form a denomination with his teaching or even his name at the head. True Biblical leadership is in mutual submission to the body just as the body is in submission to that leadership, and all are in submission to Christ.
In our fellowship, the man who God called to be pastor is the one whom God entrusted with the primary vision for our body. In that we are all in submission to him. Yet, he is also in submission to the others who God has raised up to be overseers in the body. Decisions are made by mutual consent in most cases and it is amazing to watch the way the men come to the table having heard the same thing from the Holy Spirit. I cannot recall a time when we have not been in unity, but we are committed to laying before God in a case of disagreement until we know what He desires for His body. We are simply servants who desire to carry out His will for our church so that He might use us to reach our community. I pray that this attitude continue. It is really the key to unlocking what God desires.
So titles for the sake of identification are no big deal. Titles for any other reason are a big deal. I guess it is all the attitude of the heart. That being said, I think downplaying titles is probably wise.