[EphICanIMite]

I think chops/skills are very important in church music. Knowing how the song is supposed to feel is also important. Remember that as a drummer, you're there to support/serve the song, the other musicians and the congregation. One of my motto's is "above all, do no harm". Which can have it's negative side of sometimes playing to light. But the leader can always ask me to play up if he wishes. Be accomidating. Willing to try anything. Practice with a metronome and cd's of music at home.
Be aware of the dynamics of the music. When it's supposed to be quiet and light, keep the hats closed. Make sure you leave space for the congregation/audience to hear the words as the words are the most important part in a church atmosphere. So hitting the crash cymbals in the middle of phrases of lyric is probably not the best. Make sure you have the words of the song next to you if you're not familiar with the song so you can use fills and crash cymbals when there are breaks in the sung phrases. If you can afford it, buy different kinds of sticks to give you different textures to your playing. Regular sticks of various configurations(lighter, medium, different shaped tips, nylon and wood tips), brushes, mallets, Hotrods, Coolrods, etc. Maybe even a shaker or two and some eggs(if your band doesn't have a percussionist). Some lighter, prayerful songs I even start out with just light/sparse ride and hat work. Some older hymns we do, I even do my best to play in a military march style on the snare only.
Last of all, communicate with the band leader. Ask his/her opinion of how they think the song feels and what it might call for. Or even ask what they'd like, straight up. Nothing better than good open communication. Remember, though playing drums with musicians is absolute fun... you are doing this(or should be) as a service to God.

Enjoy it/stay humble
EPH