All right! First post here I come!!!
I have an interesting perspective on this thread seeing that I was in Life Teen for four years of high school, heard God’s call, and after a year of college, entered the seminary and am currently in my third year as a seminarian. So, needless to say, I have a little bit of experience when dealing with this particular issue…
First off, I am not one of those goofy types who supports liturgical dance, glass chalices, the Beatles as liturgical music, or liturgical acrobats with trampolines during the Preparation of Gifts (I haven’t actually seen that last one; I made it up.

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I joined LT as a 9th grader needing to be confirmed after moving from rural South Carolina. I was barely Catholic; I went to Mass because my mom made me; but essentially thought like an evangelical Protestant. It was in LT that I first leaned that the Church really believed that the Eucharist was the Real Presence of Jesus Christ. At first, the LT appeal was admittedly the community, but after I made some friends, it quickly became all about the Lord. Even after some tension erupted later between some of the teens, my focus on Christ stayed strong. The Lord has been drawing me closer to him ever since then.
I must confess, before I was in LT, I did not understand the point of going to Mass. Now, obviously, having done much reading about the teachings of the Church and growing in prayer, I no longer need LT music or the great community to stay strong spiritually. Since entering the seminary, I have been blessed to learn more about and genuinely grow to love Latin, Gregorian Chant, and the rest of the Latin RIte Liturgical Tradition. But, I must say that my time in LT began this love of Christ and His Church.
Where they exist, abuses in LT Masses result not from LT itself, but rather from people (including some priests) who are simply misinformed. Since entering the seminary, I have found that the best way to deal with this problem is to discuss it with the youth minister. She and I have a mutually respectful relationship. While I wish that the environment (especially before Mass) was a little quieter and that some improvements were made to the music (it is not rock and roll, but softer; but some of the songs don’t always pertain to the Mass of the day and some are just plain cheesy), I believe that (at least at my parish) the LT Mass is celebrated reverently.
I’m sure there is more that I want to say, but I’ll just summarize:
I DO NOT like: liturgical dance, glass chalices, fluffy homilies or theology, and loud music that distreacts from rather than serves the liturgy .
I DO like: the Eucharist (understatement of the day), incense, vestments, good homilies, good music that aids in worship and creates a spirit of prayerfulness, and Life Teen (and yes, they can exist together).
Pax et bonum!