I started a 1871-1875 league. It has 16 teams from those years with an 82 game schedule. The league is split into two sub leagues each with an 8 team division. Anyways what makes this fun for me is that I manage five different teams for 10 games each. Then I choose one team to play the last 32 games with during the pennant race. It keeps me interested.
Also, in the meantime I am working on another league. This one has one sub league with 3 divisions of 7 teams. An East, Central, and West division.The East will have 7 great or decent American league teams from history. The Central will have the same amount of Negro teams. And the West National teams from history. For a start this should keep me quite busy.