Voted 1:4 although I'm more a 1:1 kind a guy. In Arma2 we have 1:1 because, well, it's supposed to be realistic. The sun and moon cycles (even stars) there also respond to time of year and latitude of the landscape (but not latitude within the same landscape, as it can't be big enough). However not even 1:4 fits well with the compressed landscape, so the devs should choose whatever they think is appropriate for the size, and not listen to us.
However, if we don't get seasons with varying day lengths and sunrise speeds, they could consider darker but shorter nights (as darker would be far less forgiving and convenient), with an artificially long sunrise period. Say first contact (sundisc on horizon) at 2100 (9PM), dark at 2300 (11PM), and it starts to grow daylight again at 0300 and last contact at 0500.
Full daylight between 0700 and 1900 (7PM).
Full night between 2300 (11PM) and 0300.
Day lasts 12 hours, night lasts 4 hours, and dusk and dawn lasts 4 hours each.
Far north this represents autumn or spring. Far north sun never sets during the summer.
And the trees in screenshots looks like autumn to me, so it doesn't appear to break anything.
Vampires still get to enjoy the full 12 hour period from 1900 (7PM) to 0700.
After sun is completely gone, there are still hours of atmospheric glow to "use".
The most annoying thing is trying to enjoy a good sunset, and it's over in a snap