A DADGAD arranged Hymn can be perfect for a guitar solo played during your church's offering or other short church service segment like during perhaps Communion or even starting or ending a worship service.
If your church is anything like our Westminster Pres Church here in Southern Oregon you might have a praise band that leads in worship for 25 minutes or so before the sermon. This form of praise and worship is very effective and used by many churches around the world. What I have found is that playing a soft, melodic and well arranged DADGAD tuned acoustic guitar solo during that same church service perhaps during the offering provides a much needed contrast to the louder praise and worship songs and offers church members a chance to both rest their ears but also relax and enjoy a softer approach.
My guitar teacher - Jai Josefs - from years ago would tell me often - "Too much steak makes beans taste mighty good". I think what he was saying is that contrast is both welcomed and critical for music of any type. So if you have a more loud and dynamic praise band you will find a welcome and loved contrast in the service by playing a soft DADGAD Hymn.
But why DADGAD tuning you might ask? A very good question indeed. I have found that DADGAD guitar tuning so very fun to play and arrange in as well as providing a very nice Celtic feel to a Hymn arrangement that people often find very meaningful. DADGAD provides the guitarist with both a modal Droned Low D note but also amazing 9ths and 11ths and other chordal structures very close as hand by nature of the DADGAD tuning itself. Many band praise and worship songs tend to be very strong in the fundamental I IV V and such approach and hearing then a DADGAD arrangement with more of a CELTIC feel and somewhat ambiguous third (not really minor or major) is a super way to provide a service with a much needed contrast to the band songs. I have seen this many times in various church services I have played at.
But don't just limit yourself to Hymn arrangements. You can at times play a standard Celtic tune which itself will provide a nice contrast to other songs being played. I will be writting more about this in a new Blog Post soon.
I should note too that I do play DADGAD tuned guitar arrangements also at more traditional church services, mostly during the offering and this also provides an excellent contrast to the heavy choir and chordal music.
In summary I would say that you can not go wrong with adding a nice short 3 minute DADGAD HYMN arranged acoustic guitar solo somewhere in your church service, perhaps during the offering to provide a nice relief and contrast to other music being used.