I’ve avoided it in a lot more places than I did it, but I still think it’s a good idea: an annual check-up with each choir member.
A director should track the ranges of the singers, getting a sense of where they can sing and how well. You can talk to your chorister about voice care: keeping hydrated, warming up on the way to Mass, things like that. I’d recommend talking about their favorite musical pieces. Ask people what they like to sing. Ask them about your own directing/conducting skills: when do they find you easy or hard to follow? If you have a forty-voice choir, that might mean 10-15 minutes each for a yearly visit. It seems like time well spent.
Needless to say, I’m not a fan of auditions for parish choirs, generally speaking. That’s not to say some people won’t need to be helped to discern another arena for their talents.