Because I am an arranger at heart, I never do a song just like the cd. I also like to encourage my people to make songs their own. If I wanted to hear Hezikiah Walker, I'll play the cd. I want to hear what my choir can do with the song. Also we don't always like the instrumentation used on a song. Other times it may be technical. I have real brass players, while many recordings use keyboards. Some of what they are playing on keys are impossible to do with real brass because of breathing or the range of the instruments themselves.
For me, substance should always preceed style. Many great worship songs are missed because we always hear it and never think what can be done to make that song paletable to our congregation. If a song is too vanilla, I might spice it up rythmically; at other times, it may be too busy, I then might clean it up some. The important thing is that I expand my people beyond their own comfort zone. I may think like this because I work in a church that is purposely pursing a goal of being multicultural.