I previously owned all 3 simultaneously. MM is gone. AFM and MB remain. AFM is just more fun for me and I personally think it is the greatest pin of all-time. MM, while in it's own right is a really great pin, just seemed to me like it was a knock-off of AFM. MB is unique - totally pretty and fun - great theme with good music and unique rules. AFM and MB made the cut for long-term, MM did not. I think you keep MB and pick one between AFM or MM to keep long term. Addendum: If I could pick only 1, I would probably pick AFM as the theme is fun, everyone understands hitting the spaceship and it provides enough challenge that it just works long term.