[Junior]

I prefer Soldier's Companion, a set of rules by the now-defunct GDW that simulate Victorian-era combat. It's easy to learn and fast to play. I do most of my creative work in GDW's House Rules System, which they used for most of their role-playing games, but which also has ancilliary ground-combat and space-combat miniatures rules. Plus it has a great design system for creating the sinews of war for that otherworldly feel.

[Poohbah]

My favorite miniatures system is the first edition of Striker. Clean mechanics, plus the ability to design anything from a WW2 Panzer to an antigrav tank of the 56th century.