What unit size do you prefer and why?

[King of Bavaria]

I prefer a smaller size, because of the better maneuverability of the troops, especially for the archers, as I generally like to have a lot of ranged troops.

For games with the standart map, I use medium-size ((?) with 133 men spears), and default-size (100 men) for the viking-scenario.
Just because armies and funds are smaller during that era.