Voted for Ancients and English Civil War. If Romans, I would like Britains to do a Rome vs. Carthage series - with war elephants, Numidian & Spanish cavalry, plus Republican Romans and their allies.
Everybody - Conte, K&C, FL is doing Imperial Romans - this would set the Britains Romans apart. I do have a large collection of AeroArt Romans and Carthaginians, including their fantastic war elephant, plus other vendors' figures such as the Blackhawk Zama series, Andrea Miniatures pieces sold by other Spanish Partware companies, but I am always interested in adding figures to my armies.
Normans and Vikings would also be nice, I could add them to my Conte figures.
On another note, how about Aztecs and Conquistadors?
I have been collecting the Britains ACW matte range since 1998, as well as their Great War series, and have just recently started to collect their War on the Nile series - their Gunboat was just too nice to pass up.
But English Civil War and Rome vs. Carthage would be outstanding. Just imagine a Roman vs. Carthage sea battle with two war galleys - that would be truly something to awe me. And hopefully the price would be more competitive than Andrea's outstanding Roman Bireme (which I have been coveting for many years).
Just my five cents.