I play all timeframes napoleonic war upto modern day ( Gulfwar 2 )and i must admit i prefere playing in WWI,WWII as they have more of a "feel" to them
As IMHO it takes more testicular fortitude to be in or play WWI,WWII as all sides then were more evenly matched..no over the horizon firing..or fire and forget...it's all up close and personal
In any case whats not to like about a WWI,WWII submarine's Diesel Electric, Rolls Royce Merlin or a Daimler-Benz engine sound's