While they might not give out hardware for team-specific Most-Valued Players, if the Boston Celtics had to choose someone, my vote would be for Al Horford.
If you haven't figured out how important the man is for Boston's overall schema by now, I'm not going to bother to make that case - we've seen the results this season and prior when he sits, and the results are not ambiguous.
But I'm not here to talk about the regular season -- it's the postseason impact of Al I'm after.