i voted RTW.
never played shogun and MTW, but i did play MTWII.
what a failure MTWII was. i was dissapointed.
RTW was a fun game, but i only really got to appreciate the game when i began playing EB, which is a mod for the game. in EB the battles are longer, units are 100% historically accurate, and the map (which is much larger) is more detailed and fun to look at.