5 hour day/night cycle, with roughly equal time for day and night, please. Minor fluctuations between day:night ratio are permittable by season and continental location on the planet.
Why 5 hours?
It's long enough that entire battles can happen in the day, or at night. It's also long enough that waiting for a specific time of day is a tactical option balanced against, well, waiting.
5 hours doesn't divide evenly into 24, so what you'll see is that every day, game-dawn will come 1 hour later in the day. Likewise, the 1:5 ratio doesn't divide evenly into a week, week-to-week, dawn will shift by 2 hours on the same day of the week, as well.
This means that people with specific playtimes will experience different times of day each session, rather than get stuck on their 7-9 pm playtime (or whatever) always being daylight, ending with 30 minutes of dusk or whatever.
Finally, different time zones for the different continents makes it so that people who want to specialize in night fighting, or people for whom the visibility hindrance of night operations is a deal-breaker can simply migrate from continent to continent to avoid or seek out their preferred lighting conditions.
Edit: If 5 hours is too short for somebody, then 10 or 11 hours would be my second pick. It will also cycle night to night, and week to week. 7 doesn't work for me, as it doesn't change week to week (dawn will always be at the same time each Saturday, for instance), and 9 hours will yield the same dawn-time every three days, which seems a little too often. 3, 4, 6, and 8-hour rotations, of course, don't change at all.
, 5 hours day time, 2 hours night time would work best in terms of immersion and feel. Night is fun but will perhaps work as a feature rather than a staple best for the majority.
Linear Mode
