Best HBO Movie?

The Man who broke 1000 chains.

Citizen Cohn

Stalin

.... and perhaps my all time fav HBO film, Citizen X.

Weapons of Mass Distraction was pretty good too.

Attack of the 50ft Woman with Daryl Hannah.

or

Breastmen with David Schwimmer

I remember liking Mistrial with Bill Pullman.

61*

By far.

Conspiracy.

partial to Stalin myself

Barbarians at the Gate.

Outstanding movie about the late 80's leveraged buyout of RJR Nabisco and the smokeless cigarette. The scenes with the cigarette are priceless.
One of James Garners best roles. You should check it out if you have not seen it.