Id like to bump this. Lokolus' 1600 AD scenario, this one is a more peaceful stance. Wars aren't so often and bad relations between different civs is more mild. If you like to explore and colonize, than this is your scenario
Lokolus' 1643 AD scenario, war is everywhere. Horde your units or be prepared to be crushed, though its not over war either, just enough to keep the game interesting if war mongering is your thing over exploration and colonization
Both great scenarios, just different styles of good. The 1600 AD scenario is the beginning of French, British and Dutch colonization so it was a natural date to start a scenario. 1643 AD was the advent of louis XIV, self explanatory