Not the most popular opinion, especially in high school, but being forced to participate in marching band in order to be involved in the band program in high school was not a very pleasant experience for myself.
However, I can't help but admire all the effort, precision, coordination, and ability that these musicians require in order to play at such a high level while marching. This is the "The Commandant's Own" United States Marine Drum and Bugle Corps at the opening of the DCI Finals in 2014. The program had a mix of different arrangements, from movie themes to big band tunes. There is a clear sense of precision and technical mastery that I cannot help but admire, even if the marching band tone is not always pleasant to listen to.
Again, this type of brass playing requires a much different type of skill set and ability than classical brass, and these musicians are some of the best in the country when it comes to drum corps performance. A link to the full performance can be found here.