Would really like to see a set of Roman Emperors. Chiefly mounted, with no need of repeat horses for all of them, say 1 sprue of horses and 3 x 12 mounted Emperors. Throw in a few famous generals such as Mark Anthony, Pompey etc for good measure.
A companion set of "enemies of Rome" would be nice, too.
Such personality sets suit the Strelets style more than anything else, in my view.