Mike:
I'm 35, and I was also away from Mass for a long while.
I hear where you're coming from about enjoying the rock Mass. At this particular time in your life, that's speaking to you and that's fine. I would respectfully submit however, that as you don't seem to have been back in the Church very long, you will find your tastes changing as you immerse yourself more deeply in the Church's most sublime mystery.
I'm a big fan of rock done right--to this day, I think the last few minutes of Genesis' sprawling 22-minute epic Supper's Ready are one of the most glorious depictions of the Last Judgment put to music in modern times. It sends chills up my spine. But I would be very much opposed to liturgizing it precisely because it is not appropriate liturgically, even though it may be beautiful in its own way. By the way--the same can be said about many great composers' Masses, which simply do not work as liturgical music.
To every thing there is a season. You may enjoy aspects of the music that you are hearing at Mass now, but I'd be surprised if your musical tastes stay there for very long. The further in one goes, the more profound and deep and rich a simple chant becomes....and one begins to find rock somewhat jarring, superficial, distracting and emotional at Mass.
Meditate more deeply on what is happening *on* the altar, and you will find yourself more and more in line with our Holy Father in what is going on *around* the altar.
Well said. Good advice.