Cut it down to 5 choices every month and give it a try.
5 names a month?
That would seem a lot. Especially that it takes at least 1 or 2 days to get the vote going and establish a winner. I was thinking more like 2 names a month, so that a name can stay there for 2 weeks so some less active people can actually see it and vets can get a feel of it.
I guess we could start with 5 names a month, but I'd imagine that being trimmed down later. Keep in mind that doing the voting and choosing does take a bit of work and effort, and with it being too common everybody will start getting tired of it quickly. Both making/running these votes as well as participating in them.