(Part 2). my pet hate - the song "Here I am to worship" (Hillsong).
This is often used as an opening "hymn" at Mass but is as slow as a dirge (hardly celebratory).
The worst aspect by far is the repeated line: "I'll never know how much it cost to see my sin upon that cross". 
This line is theologically dodgy. Christ died to free us from the power of sin, not because we have sinned. This song flies in the face of Pope Francis' message of mercy.
Worse, it leaves an impression in children's impressionable minds that it's their fault that Christ was nailed to a Cross. 
I thought we were supposed to have left all this guilt-inducing stuff behind after Vatican 2, but these lines are music to the ears of the ultra-conservatives. It's not surprising that certain parish priests (and prelates)  approve of this song. It reminds me of how one nun told our class of 8 year olds that the symbol "IHS" stamped on communion hosts meant "I have sinned". (It is of course Greek shorthand for "Jesus").