I love the play by email concept.
We started playing a game via email and it's been fantastic. It hits all of the sweet spots:
- Playing a favorite game
- Playing with a relative/friend who also loves the game
- The async nature of email means we can play when we have time since we both have jobs and families
- The slow playing forces you to really stop and think about each turn
Highly recommend it.
It seems like some games (Diplomacy in particular) should almost explicitly encourage the medium of mail rather than table top play.
I think of this every time someone mentions "man, the lag here is terrible"