Well,
I used to do English Civil War (Yes, we had one first) and World War 2.
I was on an Artillery crew in the Civil War side, and loved it. Except when we had to drag the damned thing off the field at Detling 2006 before the next display.
For WW2 I was part of a small group portraying British Para-Recce (The poor sods who got ambushed at Arnhem/Wolfheze)