I joined a random league on Yahoo!, just to play around with the Mock Draft system and look at some player rankings. But the league I joined has an auto-pick draft, which sucks. A live draft is really the only way to go. So I will probably withdraw from the league at some point.
Yahoo! is my favorite fantasy system, and I prefer head-to-head, points based, no money, live draft. 12 teams, 3 divisions with 4 teams each, I think, is the best way to go.
I would offer to commish a league, but I have never done it with baseball before, only football. So if there is any commissioners out there, please let me know what's going on.