Music in the context of the church has been debated for centuries. Music has changed and it has its own history that would benefit most of those doing any arguing. But what I want to write about here is using music and/or singing in the context of a church gathering, whether a Sunday meeting or a small group during the week.
I've been in churches that sung mainly hymns from a hymnal to a piano, and then in smaller settings in homes during the week, the piano might have been absent and the hymns sung a Capella. I've also been in churches where modern choruses were sung with worship bands up front. Also I've experiences a few churches that had a mix of both. In the churches where there was a mix, some of the people had opposite reactions. Once my pastor told me that occasionally he was hit up by people after the service, in succession, that the church was boring and stuffy because of all the hymns, then alternatively that the church had jumped right into rock 'n' roll and was loud and disrespectful.
But as far as my personal tastes go, I prefer hymns to modern choruses or praise and worship music. It's not because hymns are better, and it's not because hymns are better because they're older. There have been multitudes of hymns that were bad, and time and discretion have weeded them out from the pool. There are bad choruses today that will be weeded out in due time, leaving the best to last for several more generations. The reason I like hymns is because of their "singability."
For the most part, hymns are easier to sing precisely because they were designed to be sung by a group of people. The melody is there and a simple instrument might be the perfect accompaniment. People who are more talented at singing can sing harmony. On the other hand, many of the newer choruses were designed to be performed in a recording studio by recording artists with many instruments and special electronic effects, then put out as professionally recorded CD's, etc. The songs aren't as much sung as they are vocalized. Then these pieces are adapted to be used in church settings. I find these types of songs much more difficult to sing in groups, and the result is often less than desirable. There are some modern choruses that are perfectly singable in groups, and I like them as well. All this is not to say that hymns are good and choruses bad, it's just to say that I prefer music that is singable by a group to music that is not.