My son and I taught my niece (17), nephew (14), and brother-in-law (53) how to play Puerto Rico over the weekend...big hit with all three of them.
Started playing a buddy of mine, Kevin Earle, in MMP's Line of Battle series game None but Heroes...started with the really short, small intro scenario "The Charge of the Texas Brigade", then started but didn't finish the larger "The Cornfield" scenario. Hugely enjoyable experience. Struggled somewhat with the LOS rules, but Kevin (who has a lot more historical civil war tactical/strategic knowledge) thought the game did a really good job modelling civil war tactics and maneuver.
Neither scenario relied too heavily on the Command & Control rules relative to Issuing Orders, which another friend of mine has a few concerns with, but we both got a real sense of how brutal the nature of the warfare was during that era. The game got me interested in developing a better understanding of the history around the battle, so I picked up a copy of Antietam: The Soldiers' Battle by John M. Priest and damn, the balls it must have taken to fight in that battle left me amazed given the degree of carnage experienced by both sides.
I'm really looking forward to the next release in the series, Last Chance for Victory covering the battle of Gettysburg as it contains 22 individual scenarios in addition to several CGs. I'm not sure I will play the larger CGs in either game until I retire, but the individual scenarios seem highly manageable.