My personal vote is against the keeper league (seems to me it needs more in-depth into baseball), but I'll obey the majority.
And I don't care if it's rotisserie or head-to-head (but I prefer that once a decision is taken, we stick to it).
Rotisserie has the advantage that everyone plays the whole season, but overall movements in the standings are scarse after the first few weeks. Head-to-Head leads to more interaction (and the underdog sneaking into the finals
), but tends to rely more on luck (the tough team had a lousy week and you get the points playing mediocre ball) and shrewd roster changes than on a good basic team.