60mm x 60mm bases, or 60mm x 30mm?
I could break down the infantry and cavalry bases into two 60mm x 30mm bases to give me greater flexibility for playing other games in which the bases would represent battalions, but if I did that it would be more difficult to fit in skirmishers and the general positioning would not look quite so good IMO.
And while 1 base equals 1 battalion works well for pre- and post-Napoleonics, I feel that a lower level Napoleonic game really cries out for multi-base battalions which can be formed into column, line and square.