1/3
2 Years of Service
I'd say generally a few, as games with a bunch of characters tend to take way too long to flesh out all characters and routes.
Many characters are able to create more diversity, but tend to just create more characters I don't really care to have to deal with. I prefer having 3 characters that are decent over a game with 20 characters where only a few are interesting, and the rest just require a lot of extra time to skip past.
Some games with a bunch of character might quite good, if one is willing to wait an unknown number of years until the games are finished.
Many characters are able to create more diversity, but tend to just create more characters I don't really care to have to deal with. I prefer having 3 characters that are decent over a game with 20 characters where only a few are interesting, and the rest just require a lot of extra time to skip past.
Some games with a bunch of character might quite good, if one is willing to wait an unknown number of years until the games are finished.